Tax Professionals Calendar

Title
  
Description
Start Date
  
End Time
  
Location
  
All Day Event
  
ICS Download File
  
ID
  
4th quarter dry cleaning fee returns due
1/26/2026 12:00 AM1/26/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-01-26-4th-quarter-dry-cleaning-fee-returns-due.ics3275
Sales and use tax return due - monthly, quarterly and annual
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-Sales-and-use-tax-return-due-monthly-quarterly-and-annual.ics3276
WT-7 reconciliation due, including wage statements (w2s) and information returns (1099s)
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-WT-7-reconciliation-due-including-wage-statements-(w2s)-and-information-returns.ics3278
WT-6 deposit report due - semi-monthly, monthly and quarterly
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics3279
Local expo tax return due - monthly, quarterly, annual
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-Local-expo-tax return-due-monthly-quarterly-annual.ics3280
Premier resort tax return due - monthly, quarterly, annual
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-Premier-resort-tax-return-due-monthly-quarterly-annual.ics3281
Rental vehicle tax return due - quarterly
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-Rental-vehicle-tax-return-due-quarterly.ics3282
PW-2 due (S Corps)
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-PW-2-due-(S-Corps).ics3283
911 fee due - monthly
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-911-fee-due-monthly.ics3284
Alternate fuel, terminal operator return due - monthly, quarterly
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics3285
Supplier, shipper, transporter fuel tax return due - monthly
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics3286
PW-2 due (Partnerships)
2/2/2026 12:00 AM2/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-02-PW-2-due-(Partnerships).ics3287
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
2/8/2026 12:00 AM2/8/2026 11:59 PMYes3360
WT-6 deposit report due - semi-monthly
2/16/2026 12:00 AM2/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-16-WT-6-deposit-report-due-semi-monthly.ics3288
Cigarette-tobacco products return due - monthly
2/16/2026 12:00 AM2/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-16-Cigarette-tobacco-products-return-due-monthly.ics3289
Liquor-beer return due - monthly
2/16/2026 12:00 AM2/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-16-Liquor-beer-return-due-monthly.ics3290
Supplier, shipper, transporter fuel tax payment due - monthly
2/16/2026 12:00 AM2/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-16-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3291
Blenders fuel tax return due - intermittent monthly
2/20/2026 12:00 AM2/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-20-Blenders-fuel-tax-return-due-intermittent-monthly.ics3292
Sales and use tax return due - early monthly
2/20/2026 12:00 AM2/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-02-20-Sales-and-use-tax-return-due-early-monthly.ics3293
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
3/1/2026 12:00 AM3/1/2026 11:59 PMYes3361
Aviation fuel tax return due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-Aviation-fuel-tax-return-due-monthly.ics3294
Sales and use tax return due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-Sales-and-use-tax-return-due-monthly.ics3295
WT-6 deposit report due - semi-monthly and monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-WT-6-deposit-report-due-semi-monthly-and-monthly.ics3296
Local expo tax return due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-Local-expo-tax-return-due-monthly.ics3297
Premier resort tax return due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-Premier-resort-tax-return-due-monthly.ics3298
PW-2 due (Estates and trusts)
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-PW-2-due-(Estates-and-trusts).ics3299
911 fee due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-911-fee-due-monthly.ics3300
Alternate fuel, terminal operator return due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-Alternate-fuel-terminal-operator-return-due-monthly.ics3301
Supplier, shipper, transporter fuel tax return due - monthly
3/2/2026 12:00 AM3/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-02-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics3302
WT-6 deposit report due - semi-monthly
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-WT-6-deposit-report-due-semi-monthly.ics3303
PW-ES 1st pass-through withholding estimated payment due
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-PW-ES-1st-pass-through-withholding-estimated-payment-due.ics3304
PW-1 due (Partnerships and S Corps)
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-PW-1-due-(Partnerships-and-S-Corps).ics3305
Partnership tax return due
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-Partnership-tax-return-due.ics3306
S Corporation tax return due
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-S-Corporation-tax-return-due.ics3307
Cigarette-tobacco products return due - monthly
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-Cigarette-tobacco-products-return-due-monthly.ics3308
Liquor-beer return due - monthly
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-Liquor-beer-return-due-monthly.ics3309
Supplier, shipper, transporter fuel tax payment due - monthly
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3310
Blenders fuel tax return due - intermittent monthly
3/16/2026 12:00 AM3/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-16-Blenders-fuel-tax-return-due-intermittent-monthly.ics3311
Sales and use tax return due - early monthly
3/20/2026 12:00 AM3/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-20-Sales-and-use-tax-return-due-early-monthly.ics3312
Aviation fuel tax return due - monthly
3/20/2026 12:00 AM3/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-20-Aviation-fuel-tax-return-due-monthly.ics3313
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
3/22/2026 12:00 AM3/22/2026 11:59 PMYes3362
Sales and use tax return due - monthly
3/31/2026 12:00 AM3/31/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-31-Sales-and-use-tax-return-due-monthly.ics3314
WT-6 deposit report due - semi-monthly and monthly
3/31/2026 12:00 AM3/31/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-31-WT-6-deposit-report-due-semi-monthly-and-monthly.ics3315
Local expo tax return due - monthly
3/31/2026 12:00 AM3/31/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-31-Local-expo-tax-return-due-monthly.ics3316
Premier resort tax return due - monthly
3/31/2026 12:00 AM3/31/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-31-Premier-resort-tax-return-due-monthly.ics3317
911 fee due - monthly
3/31/2026 12:00 AM3/31/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-31-911-fee-due-monthly.ics3318
Alternate fuel, terminal operator return due - monthly
3/31/2026 12:00 AM3/31/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-03-31-Alternate-fuel-terminal-operator-return-due-monthly.ics3319
Individual income tax returns due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Individual-income-tax-returns-due.ics3320
1st quarter individual income tax estimated payment due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-1st-quarter-individual-income-tax-estimated-payment-due.ics3321
WT-6 deposit report due - semi-monthly
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-WT-6-deposit-report-due-semi-monthly.ics3322
Cigarette-tobacco products return due - monthly, quarterly
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Cigarette-tobacco-products-return-due-monthly-quarterly.ics3323
Liquor-beer return due - monthly
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Liquor-beer-return-due-monthly.ics3324
Supplier, shipper, transporter fuel tax payment due - monthly
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3325
Blenders fuel tax return due - intermittent monthly
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics3326
Wine direct shippers return due - quarterly
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Wine-direct-shippers-return-due-quarterly.ics3327
Exempt employees trust, IRA, MSA fiduciary income tax return due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Exempt-employees-trust-IRA-MSA-fiduciary-income-tax-return-due.ics3328
Corporation franchise or income tax return due (Non-combined and combined)
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Corporation-franchise-or-income-tax-return-due-(Non-combined-and-combined).ics3329
Fiduciary income tax returns due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Fiduciary-income-tax-returns-due.ics3330
1CNP composite return for nonresident partners due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-1CNP-composite-return-for-nonresident-partners-due.ics3331
1CNS composite return for nonresident shareholder due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-1CNS-composite-return-for-nonresident-shareholder-due.ics3332
PW-1 due (Estates and trusts)
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-PW-1-due-(Estates-and-trusts).ics3333
Corp-ES Corporation 1st quarter estimated tax payment due
4/15/2026 12:00 AM4/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-15-Corp-ES-Corporation-1st-quarter-estimated-tax-payment-due.ics3334
Sales and use tax return due - early monthly
4/20/2026 12:00 AM4/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-20-Sales-and-use-tax-return-due-early-monthly.ics3335
Aviation fuel tax return due - monthly, quarterly
4/20/2026 12:00 AM4/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-20-Aviation-fuel-tax-return-due-monthly-quarterly.ics3336
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
4/26/2026 12:00 AM4/26/2026 11:59 PMYes3363
1st quarter dry cleaning fee returns due
4/27/2026 12:00 AM4/27/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-27-1st-quarter-dry-cleaning-fee-returns-due.ics3337
Sales and use tax return due - monthly and quarterly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-Sales-and-use-tax-return-due-monthly-and-quarterly.ics3338
WT-6 deposit report due - semi-monthly, monthly and quarterly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics3339
Local expo tax return due - monthly and quarterly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-Local-expo-tax-return-due-monthly-and-quarterly.ics3340
Premier resort tax return due - monthly and quarterly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-Premier-resort-tax-return-due-monthly-and-quarterly.ics3341
911 fee due - monthly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-911-fee-due-monthly.ics3342
Rental vehicle tax return due - quarterly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-Rental-vehicle-tax-return-due-quarterly.ics3343
Alternate fuel, terminal operator return due - monthly, quarterly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics3344
Supplier, shipper, transporter fuel tax return due - monthly
4/30/2026 12:00 AM4/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-04-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics3345
WT-6 deposit report due - semi-monthly
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-WT-6-deposit-report-due-semi-monthly.ics3346
Exempt corporation franchise or income tax return due
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-Exempt-corporation-franchise-or-income-tax-return-due.ics3347
Exempt non-employees trust, IRA, MSA fiduciary income tax return due
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-Exempt-non-employees-trust-IRA-MSA-fiduciary-income-tax-return-due.ics3348
Cigarette-tobacco products return due - monthly
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-Cigarette-tobacco-products-return-due-monthly.ics3349
Liquor-beer return due - monthly
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-Liquor-beer-return-due-monthly.ics3350
Supplier, shipper, transporter fuel tax payment due - monthly
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3351
Blenders fuel tax return due - intermittent monthly
5/15/2026 12:00 AM5/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics3352
Sales and use tax return due - early monthly
5/20/2026 12:00 AM5/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-20-Sales-and-use-tax-return-due-early-monthly.ics3353
Aviation fuel tax return due - monthly
5/20/2026 12:00 AM5/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-05-20-Aviation-fuel-tax-return-due-monthly.ics3354
State of Wisconsin holiday - Revenue offices closed
5/25/2026 12:00 AM5/25/2026 11:59 PMYes3355
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
5/31/2026 12:00 AM5/31/2026 11:59 PMYes3364
Sales and use tax return due - monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-Sales-and-use-tax-return-due-monthly.ics3377
WT-6 deposit report due - semi-monthly and monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-WT-6-deposit-report-due-semi-monthly-and-monthly.ics3378
Local expo tax return due - monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-Local-expo-tax-return-due-monthly.ics3379
Premier resort tax return due - monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-Premier-resort-tax-return-due-monthly.ics3380
911 fee due - monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-911-fee-due-monthly.ics3381
Alternate fuel, terminal operator return due - monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-Alternate-fuel-terminal-operator-return-due-monthly.ics3382
Supplier, shipper, transporter fuel tax return due - monthly
6/1/2026 12:00 AM6/1/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-01-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics3383
WisTax, Wisconsin Telefile and My Tax Account outage
6/5/2026 12:00 AM6/5/2026 11:59 PMYes3365
WisTax, Wisconsin Telefile and My Tax Account outage
6/6/2026 12:00 AM6/6/2026 11:59 PMYes3366
WisTax, Wisconsin Telefile and My Tax Account outage
6/7/2026 12:00 AM6/7/2026 11:59 PMYes3367
1-ES 2nd quarter individual income tax estimated payment due
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-1-ES-2nd-quarter-individual-income-tax-estimated-payment-due.ics3384
WT-6 deposit report due - semi-monthly
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-WT-6-deposit-report-due-semi-monthly.ics3385
Cigarette-tobacco products return due - monthly
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-Cigarette-tobacco-products-return-due-monthly.ics3386
Liquor-beer return due - monthly
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-Liquor-beer-return-due-monthly.ics3387
Supplier, shipper, transporter fuel tax payment due - monthly
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3388
Blenders fuel tax return due - intermittent monthly
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics3389
Corp-ES 2nd corporation estimated payment due
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-Corp-ES-2nd-corporation-estimated-payment-due.ics3390
PW-ES 2nd pass-through withholding estimated payment due
6/15/2026 12:00 AM6/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2026-06-15-PW-ES-2nd-pass-through-withholding-estimated-payment-due.ics3391
WisTax, Wisconsin Telefile and My Tax Account outage
6/21/2026 12:00 AM6/21/2026 11:59 PMYes3368
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
7/26/2026 12:00 AM7/26/2026 11:59 PMYes3369
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
8/23/2026 12:00 AM8/23/2026 11:59 PMYes3370
WisTax, Wisconsin Telefile and My Tax Account outage
9/18/2026 12:00 AM9/18/2026 11:59 PMYes3371
WisTax, Wisconsin Telefile and My Tax Account outage
9/19/2026 12:00 AM9/19/2026 11:59 PMYes3372
WisTax, Wisconsin Telefile and My Tax Account outage
9/20/2026 12:00 AM9/20/2026 11:59 PMYes3373
WisTax, Wisconsin Telefile and My Tax Account outage
10/25/2026 12:00 AM10/25/2026 11:59 PMYes3374
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
11/22/2026 12:00 AM11/22/2026 11:59 PMYes3375
WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
12/20/2026 12:00 AM12/20/2026 11:59 PMYes3376
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