Tax Professionals Calendar

  
Description
  
  
  
  
  
  
1st quarter dry cleaning fee returns due
4/26/2021 12:00 AM4/26/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-4-26-1st-quarter-dry-cleaning-fee-returns-due.ics2131
Sales and use tax return due - monthly and quarterly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-4-30-Sales-and-use-tax-return-due-monthly-and-quarterly.ics2132
WT-6 deposit report due - semi-monthly, monthly and quarterly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-4-30-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics2133
Local expo tax return due - monthly and quarterly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-4-30-Local-expo-tax-return-due-monthly-and-quarterly.ics2134
Premier resort tax return due - monthly and quarterly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-4-30-Premier-resort-tax-return-due-monthly-and-quarterly.ics2135
Police and fire protection fee due - monthly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-04-30-Police-and-fire-protection-fee-due-monthly.ics2136
Alternate fuel, terminal operator return due - monthly, quarterly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-04-30-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics2139
Supplier, shipper, transporter fuel tax return due - monthly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-04-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2140
Aviation fuel tax return due - monthly, quarterly
4/30/2021 12:00 AM4/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-04-30-Aviation-fuel-tax-return-due-monthly-quarterly.ics2141
My Tax Account, Wisconsin Telefile and Wis e-File system file outage 5am-noon
5/2/2021 12:00 AM5/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-02-My-Tax-Account-Wisconsin-Telefile-and-Wis-e-File-system-file-outage-5am-noon.ics2143
Individual income tax returns due
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Individual-income-tax-returns-due.ics2142
Exempt corporation franchise or income tax return due
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Exempt-corporation-franchise-or-income-tax-return-due.ics2144
Exempt non-employee's trust, IRA, MSA Fiduciary income tax return due
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Exempt-non-employees-trust-IRA-MSA-fiduciary-income-tax-return-due.ics2145
WT-6 deposit report due - semi-monthly
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-WT-6-deposit-report-due-semi-monthly.ics2146
Cigarette-tobacco products return due - monthly
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Cigarette-tobacco-products-return-due-monthly.ics2147
Liquor-beer return due - monthly
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Liquor-beer-return-due-monthly.ics2148
Supplier, shipper, transporter fuel tax payment due - monthly
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2149
Blenders fuel tax return due - intermittent monthly
5/17/2021 12:00 AM5/17/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-17-Blenders-fuel-tax-return-due-intermittent-monthly.ics2150
Sales and use tax return due - early monthly
5/20/2021 12:00 AM5/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-20-Sales-and-use-tax-return-due-early monthly.ics2152
Aviation fuel tax return due - monthly
5/20/2021 12:00 AM5/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-05-20-Aviation-fuel-tax-return-due-monthly.ics2153
State of Wisconsin holiday - Revenue offices closed
5/31/2021 12:00 AM5/31/2021 11:59 PMYes2154
Sales and use tax return due - monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-Sales-and-use-tax-return-due-monthly.ics2161
WT-6 deposit report due - semi-monthly and monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-WT-6-deposit-report-due-semi-monthly-and-monthly.ics2162
Local expo tax return due - monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-Local-expo-tax-return-due-monthly.ics2163
Premier resort tax return due - monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-Premier-resort-tax-return-due-monthly.ics2164
Police and fire protection fee due - monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-Police-and-fire-protection-fee-due-monthly.ics2165
Alternate fuel, terminal operator return due - monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-Alternate-fuel-terminal-operator-return-due-monthly.ics2166
Supplier, shipper, transporter fuel tax return due - monthly
6/1/2021 12:00 AM6/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-01-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2167
Wisconsin e-File, Wisconsin Telefile and My Tax Account file outage 5am-noon
6/6/2021 12:00 AM6/6/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-06-Wisconsin-e-File-Wisconsin-Telefile-and-My-Tax-Account-file-outage-5am-noon.ics2168
WT-6 deposit report due - semi-monthly
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-15-WT-6-deposit-report-due-semi-monthly.ics2169
Cigarette-tobacco products return due - monthly
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-15-Cigarette-tobacco-products-return-due-monthly.ics2170
Liquor-beer return due - monthly
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-15-Liquor-beer-return-due-monthly.ics2172
Supplier, shipper, transporter fuel tax payment due - monthly
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2173
Blenders fuel tax return due - intermittent monthly
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics2174
Corp-ES 2nd corporation estimated payment due
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-15-Corp-ES-2nd-corporation-estimated-payment-due.ics2175
PW-ES 2nd pass-through withholding estimated payment due
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-15-PW-ES-2nd-pass-through-withholding-estimated-payment-due.ics2176
1-ES 2nd quarter individual income tax estimated payment due
6/15/2021 12:00 AM6/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-15-1-ES-2nd-quarter-individual-income-tax-estimated-payment-due.ics2177
Sales and use tax return due - early monthly
6/21/2021 12:00 AM6/21/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-21-Sales-and-use-tax-return-due-early-monthly.ics2178
Aviation fuel tax return due - monthly
6/21/2021 12:00 AM6/21/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-21-Aviation-fuel-tax-return-due-monthly.ics2179
Wisconsin e-File, Wisconsin Telefile and My Tax Account file outage 5am-noon
6/27/2021 12:00 AM6/27/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals\2021-06-27-Wisconsin-e-File-Wisconsin-Telefile-and-My-Tax-Account-file-outage-5am-noon.ics2180
Sales and use tax return due - monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-Sales-and-use-tax-return-due-monthly.ics2181
WT-6 deposit report due - semi-monthly and monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-WT-6-deposit-report-due-semi-monthly-and-monthly.ics2182
Local expo tax return due - monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-Local-expo-tax-return-due-monthly.ics2183
Premier resort tax return due - monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-Premier-resort-tax-return-due-monthly.ics2184
Police and fire protection fee due - monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-Police-and-fire-protection-fee-due-monthly.ics2185
Alternate fuel, terminal operator return due - monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-Alternate-fuel-terminal-operator-return-due-monthly.ics2186
Supplier, shipper, transporter fuel tax return due - monthly
6/30/2021 12:00 AM6/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-06-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2187
State of Wisconsin holiday - Revenue offices closed
7/5/2021 12:00 AM7/5/2021 11:59 PMYes2155
WT-6 deposit report due - semi-monthly
7/15/2021 12:00 AM7/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-07-15-WT-6-deposit-report-due-semi-monthly.ics2188
Cigarette-tobacco products return due - monthly, quarterly
7/15/2021 12:00 AM7/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-07-15-Cigarette-tobacco-products-return-due-monthly-quarterly.ics2189
Sales and use tax return due – early monthly
7/20/2021 12:00 AM7/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-07-20-Sales-and-use-tax-return-due–early-monthly.ics2190
Aviation fuel tax return due - monthly, quarterly
7/20/2021 12:00 AM7/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-07-20-Aviation-fuel-tax-return-due-monthly-quarterly.ics2191
2nd quarter dry cleaning fee returns due
7/27/2021 12:00 AM7/27/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-07-27-2nd-quarter-dry-cleaning-fee-returns-due.ics2192
Sales and use tax return due - monthly and quarterly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Sales-and-use-tax-return-due-monthly-and-quarterly.ics2193
WT-6 deposit report due - semi-monthly, monthly and quarterly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics2194
Local expo tax return due - monthly and quarterly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Local-expo-tax-return-due-monthly-and-quarterly.ics2195
Premier resort tax return due - monthly and quarterly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Premier-resort-tax-return-due-monthly-and-quarterly.ics2196
Police and fire protection fee due - monthly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Police-and-fire-protection-fee-due-monthly.ics2197
Rental vehicle tax return due - quarterly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Rental-vehicle-tax-return-due-quarterly.ics2198
Alternate fuel, terminal operator return due - monthly, quarterly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics2199
Supplier-shipper-transporter fuel tax return due - monthly
8/2/2021 12:00 AM8/2/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-02-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2200
Wisconsin e-File, Wisconsin Telefile and My Tax Account file outage 5am-noon
8/8/2021 12:00 AM8/8/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-08-Wisconsin-e-File-Wisconsin-Telefile-and-My-Tax-Account-file-outage-5am-noon.ics2201
WT-6 deposit report due - semi-monthly
8/16/2021 12:00 AM8/16/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-16-WT-6-deposit-report-due-semi-monthly.ics2202
Cigarette-tobacco products return due - monthly
8/16/2021 12:00 AM8/16/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-16-Cigarette-tobacco-products-return-due-monthly.ics2203
Liquor-beer return due - monthly
8/16/2021 12:00 AM8/16/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-16-Liquor-beer-return-due-monthly.ics2204
Supplier-shipper-transporter fuel tax payment due - monthly
8/16/2021 12:00 AM8/16/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-16-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2205
Blenders fuel tax return due - intermittent monthly
8/16/2021 12:00 AM8/16/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-16-Blenders-fuel-tax-return-due-intermittent-monthly.ics2206
Sales and use tax return due - early monthly
8/20/2021 12:00 AM8/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-20-Sales-and-use-tax-return-due-early-monthly.ics2207
Aviation fuel tax return due - monthly
8/20/2021 12:00 AM8/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-20-Aviation-fuel-tax-return-due-monthly.ics2208
Sales and use tax return due - monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-Sales-and-use-tax-return-due-monthly.ics2209
WT-6 deposit report due - semi-monthly, monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-WT-6-deposit-report-due-semi-monthly-monthly.ics2210
Local expo tax return due - monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-Local-expo-tax-return-due-monthly.ics2211
Premier resort tax return due - monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-Premier-resort-tax-return-due-monthly.ics2212
Police and fire protection fee due - monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-Police-and-fire-protection-fee-due-monthly.ics2213
Alternate fuel, terminal operator return due - monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-Alternate-fuel-terminal-operator-return-due-monthly.ics2215
Supplier-shipper-transporter fuel tax return due - monthly
8/31/2021 12:00 AM8/31/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-08-31-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2216
State of Wisconsin holiday - Revenue offices closed
9/6/2021 12:00 AM9/6/2021 11:59 PMYes2156
My Tax Account,  Wisconsin Telefile and Wis e-File system file outage all day
9/11/2021 12:00 AM9/11/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-11-My-Tax-Account-Wisconsin-Telefile-and-Wis-e-File-system-file-outage-all-day.ics2217
My Tax Account,  Wisconsin Telefile and Wis e-File system file outage all day
9/12/2021 12:00 AM9/12/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-12-My-Tax-Account-Wisconsin-Telefile-and-Wis-e-File-system-file-outage-all-day.ics2218
WT-6 deposit report due - semi-monthly
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-WT-6-deposit-report-due -semi-monthly.ics2219
Cigarette, tobacco products return due - monthly
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-Cigarette-tobacco-products-return-due-monthly.ics2220
Liquor, beer return due - monthly
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-Liquor-beer-return-due-monthly.ics2221
Supplier, shipper, transporter fuel tax payment due - monthly
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2222
Blenders fuel tax return due - intermittent monthly
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics2223
PW-ES 3rd pass-through withholding estimated payment due
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-PW-ES-3rd-pass-through-withholding-estimated-payment-due.ics2224
Partnership tax return extension deadline
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-Partnership-tax-return-extension-deadline.ics2225
Corp-ES 3rd corporation estimated payment due
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-Corp-ES-3rd-corporation-estimated-payment-due.ics2226
1-ES 3rd quarter individual income tax estimated payment due
9/15/2021 12:00 AM9/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-15-1-ES-3rd-quarter-individual-income-tax-estimated-payment-due.ics2227
Sales and use tax return due - early monthly
9/20/2021 12:00 AM9/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-20-Sales-and-use-tax-return-due-early-monthly.ics2228
Aviation fuel tax return due - monthly
9/20/2021 12:00 AM9/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-20-Aviation-fuel-tax-return-due-monthly.ics2229
Sales and use tax return due - monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Sales-and-use-tax-return-due-monthly.ics2230
Fiduciary tax return extension deadline
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Fiduciary-tax-return-extension-deadline.ics2231
WT-6 deposit report due - semi-monthly and monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-WT-6-deposit-report-due-semi-monthly-and-monthly.ics2232
Local expo tax return due - monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Local-expo-tax-return-due-monthly.ics2233
Premier resort tax return due - monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Premier-resort-tax-return-due-monthly.ics2234
Police and fire protection fee due - monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Police-and-fire-protection-fee-due-monthly.ics2235
Alternate fuel, terminal operator return due - monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Alternate-fuel-terminal-operator-return-due-monthly.ics2236
Supplier, shipper, transporter fuel tax return due - monthly
9/30/2021 12:00 AM9/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-09-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2237
My Tax Account, Wisconsin Telefile and Wis e-File system file outage 5am-noon
10/3/2021 12:00 AM10/3/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2021-10-03-My-Tax-Account-Wisconsin-Telefile-and-Wis-e-File-system-file-outage-5am-noon.ics2238
1CNP extension deadline
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-1CNP-extension-deadline.ics2239
1CNS extension deadline
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-1CNS-extension-deadline.ics2240
S Corporation tax return extension deadline
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-S-Corporation-tax-return-extension-deadline.ics2241
Exempt employee's trust, ISA, MSA Fiduciary tax return extension deadline
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-Exempt-employees-trust-ISA-MSA-Fiduciary-tax-return-extension-deadline.ics2242
PW-1 (Partnerships) extension deadline
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-PW-1-(Partnerships)-extension-deadline.ics2243
PW-1 (S Corps) extension deadline
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2021-10-15-PW-1-(S-Corps)-extension-deadline.ics2244
Cigarette, tobacco products return due - monthly, quarterly
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2021-10-15-Cigarette-tobacco-products-return-due-monthly-quarterly.ics2245
Liquor, beer return due - monthly
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2021-10-15-Liquor-beer-return-due-monthly.ics2246
Supplier, shipper, transporter fuel tax payment due - monthly
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2247
Blenders fuel tax return due - intermittent monthly
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics2248
Wine direct shippers return due - quarterly
10/15/2021 12:00 AM10/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-15-Wine-direct-shippers-return-due-quarterly.ics2249
Sales and use tax return due - early monthly
10/20/2021 12:00 AM10/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-20-Sales-and-use-tax-return-due-early-monthly.ics2250
Aviation fuel tax return due - monthly, quarterly
10/20/2021 12:00 AM10/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-20-Aviation-fuel-tax-return-due-monthly-quarterly.ics2251
3rd quarter dry cleaning fee returns due
10/25/2021 12:00 AM10/25/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-10-25-3rd-quarter-dry-cleaning-fee-returns-due.ics2252
Sales and use tax return due - monthly and quarterly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Sales-and-use-tax-return-due-monthly-and-quarterly.ics2254
WT-6 deposit report due - semi-monthly, monthly and quarterly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics2255
Local expo tax return due - monthly and quarterly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Local-expo-tax-return-due-monthly-and-quarterly.ics2256
Premier resort tax return due - monthly and quarterly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Premier-resort-tax-return-due-monthly-and-quarterly.ics2257
Police and fire protection fee due - monthly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Police-and-fire-protection-fee-due-monthly.ics2258
Rental vehicle tax return due - quarterly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Rental-vehicle-tax-return-due-quarterly.ics2259
Alternate fuel, terminal operator return due - monthly, quarterly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics2260
Supplier, shipper, transporter fuel tax return due - monthly
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2261
Holder reports due
11/1/2021 12:00 AM11/1/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-01-Holder-reports-due.ics2262
WT-6 deposit report due - semi-monthly
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-WT-6-deposit-report-due-semi-monthly.ics2263
PW-1 (Estates and trusts) extension deadline
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-PW-1-Estates-and-trusts-extension-deadline.ics2264
Corporation tax return extension deadline (Non-combined and combined)
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Corporation-tax-return-extension-deadline-Non-combined-and-combined.ics2265
Cigarette, tobacco products return due - monthly
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Cigarette-tobacco-products-return-due-monthly.ics2266
Cigarette, tobacco products return due - monthly
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Cigarette-tobacco-products-return-due-monthly.ics2267
Liquor, beer return due - monthly
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Liquor-beer-return-due-monthly.ics2268
Supplier, shipper, transporter fuel tax payment due - monthly
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2269
Blenders fuel tax return due - intermittent monthly
11/15/2021 12:00 AM11/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics2270
Sales and use tax return due - early monthly
11/22/2021 12:00 AM11/22/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-22-Sales-and-use-tax-return-due-early-monthly.ics2271
Aviation fuel tax return due - monthly
11/22/2021 12:00 AM11/22/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-22-Aviation-fuel-tax-return-due-monthly.ics2272
State of Wisconsin holiday - Revenue offices closed
11/25/2021 12:00 AM11/25/2021 11:59 PMYes2157
Sales and use tax return due - monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-Sales-and-use-tax-return-due-monthly.ics2273
WT-6 deposit report due - semi-monthly, monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-WT-6-deposit-report-due-semi-monthly-monthly.ics2274
Local expo tax return due - monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-Local-expo-tax-return-due-monthly.ics2276
Premier resort tax return due - monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-Premier-resort-tax-return-due-monthly.ics2277
Police and fire protection fee due - monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-Police-and-fire-protection-fee-due-monthly.ics2278
Alternate fuel, terminal operator return due - monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-Alternate-fuel-terminal-operator-return-due-monthly.ics2279
Supplier, shipper, transporter fuel tax return due - monthly
11/30/2021 12:00 AM11/30/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics2280
Wisconsin e-File, Wisconsin Telefile and My Tax Account file outage 5am-noon
12/5/2021 12:00 AM12/5/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-05-Wisconsin-e-File-Wisconsin-Telefile-and-My-Tax-Account-file-outage-all-day.ics2281
WT-6 deposit report due - semi-monthly
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15- WT-6-deposit-report-due-semi-monthly.ics2282
Exempt corporation tax return extension deadline
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-11-15-Exempt-corporation-tax-return-extension-deadline.ics2283
Exempt non-employee's trust, IRA, MSA Fiduciary  tax return extension deadline
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-Exempt-non-employees-trust-IRA-MSA-Fiduciary-tax-return-extension-deadline.ics2284
Cigarette, tobacco products return due - monthly
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-Cigarette-tobacco-products-return-due-monthly.ics2285
Liquor, beer return due - monthly
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-Liquor-beer-return-due-monthly.ics2286
Supplier, shipper, transporter fuel tax payment due - monthly
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics2287
Blenders fuel tax return due - intermittent monthly
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics2288
4th pass-through withholding estimated payment due
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-4th-pass-through-withholding-estimated-payment-due.ics2289
4th corporation estimated payment due
12/15/2021 12:00 AM12/15/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-15-4th-corporation-estimated-payment-due.ics2290
Sales and use tax return due - early monthly
12/20/2021 12:00 AM12/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-20-Sales-and-use-tax-return-due-early-monthly.ics2291
Aviation fuel tax return due - monthly
12/20/2021 12:00 AM12/20/2021 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2021-12-20-Aviation-fuel-tax-return-due-monthly.ics2292
State of Wisconsin holiday - Revenue offices closed
12/24/2021 12:00 AM12/24/2021 11:59 PMYes2160
State of Wisconsin holiday - Revenue offices closed
12/31/2021 12:00 AM12/31/2021 11:59 PMYes2159