| 1st quarter individual income tax estimated payment due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-1st-quarter-individual-income-tax-estimated-payment-due.ics | 1866 |
| PW-ES 1st pass-through withholding estimated payment due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-PW-ES-1st-pass-through-withholding-estimated-payment-due.ics | 1873 |
| Exempt corporation franchise or income tax return due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Exempt-corporation-franchise-or-income-tax-return-due.ics | 1885 |
| Corp-ES 2nd corporation estimated payment due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-06-15-Corp-ES-2nd-corporation-estimated-payment-due.ics | 1900 |
| PW-ES 2nd pass-through withholding estimated payment due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-06-15-PW-ES-2nd-pass-through-withholding-estimated-payment-due.ics | 1901 |
| WT-6 deposit report due - semi-monthly | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-WT-6-deposit-report-due-semi-monthly.ics | 1923 |
| Cigarette-tobacco products return due - monthly, quarterly | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Cigarette-tobacco-products-return-due-monthly-quarterly.ics | 1924 |
| Liquor-beer return due - monthly | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Liquor-beer-return-due-monthly.ics | 1925 |
| Supplier-shipper-transporter fuel tax payment due - monthly | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics | 1926 |
| Blenders fuel tax return due - intermittent monthly | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics | 1927 |
| Wine direct shippers return due - quarterly | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Wine-direct-shippers-return-due-quarterly.ics | 1928 |
| Fiduciary income tax returns due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Fiduciary-income-tax-returns-due.ics | 1931 |
| 1CNP composite return for nonresident partners due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-1CNP-composite-return-for-nonresident-partners-due.ics | 1932 |
| 1CNS composite return for nonresident shareholder due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-1CNS-composite-return-for-nonresident-shareholder-due.ics | 1933 |
| PW-1 due (Estates and trusts) | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-PW-1-due-Estates-and-trusts.ics | 1934 |
| Exempt employee's trust, IRA, MSA Fiduciary income tax return due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Exempt-employee's-trust-IRA-MSA-Fiduciary-income-tax-return-due.ics | 1935 |
| Corporation franchise or income tax return due (Non-combined and combined) | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Corporation-franchise-or-income-tax-return-due-Non-combined-and-combined.ics | 1936 |
| Corp-ES Corporation 1st quarter estimated tax payment due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-15-Corp-ES-Corporation-1st-quarter-estimated-tax-payment-due.ics | 1937 |
| 1-ES 2nd quarter individual income tax estimated payment due | | 7/15/2020 12:00 AM | 7/15/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-06-15-1-ES-2nd-quarter-individual-income-tax-estimated-payment-due.ics | 1945 |
| Sales and use tax return due – early monthly | | 7/20/2020 12:00 AM | 7/20/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-20-Sales-and-use-tax-return-due–early-monthly.ics | 1963 |
| Sales and use tax return due - monthly and quarterly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Sales-and-use-tax-return-due-monthly-and-quarterly.ics | 1938 |
| Local expo tax return due - monthly and quarterly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Local-expo-tax-return-due-monthly-and-quarterly.ics | 1939 |
| Premier resort tax return due - monthly and quarterly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Premier-resort-tax-return-due-monthly-and-quarterly.ics | 1940 |
| Police and fire protection fee due - monthly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Police-and-fire-protection-fee-due-monthly.ics | 1941 |
| Rental vehicle tax return due - quarterly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Rental-vehicle-tax-return-due-quarterly.ics | 1942 |
| Alternate fuel, terminal operator return due - monthly, quarterly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics | 1943 |
| Supplier-shipper-transporter fuel tax return due - monthly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics | 1944 |
| WT-6 deposit report due - semi-monthly, monthly and quarterly | | 7/31/2020 12:00 AM | 7/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-07-31-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics | 1946 |
| Wisconsin e-File, Wisconsin Telefile and My Tax Account file outage 5am - noon | | 8/4/2020 12:00 AM | 8/4/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-04-Wisconsin-e-File-Wisconsin-Telefile-and-My-Tax-Account-file-outage-5am-noon.ics | 1947 |
| WT-6 deposit report due - semi-monthly | | 8/17/2020 12:00 AM | 8/17/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-17-WT-6-deposit-report-due-semi-monthly.ics | 1948 |
| Cigarette-tobacco products return due - monthly | | 8/17/2020 12:00 AM | 8/17/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-17-Cigarette-tobacco-products-return-due-monthly.ics | 1949 |
| Liquor-beer return due - monthly | | 8/17/2020 12:00 AM | 8/17/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-17-Liquor-beer-return-due-monthly.ics | 1950 |
| Supplier-shipper-transporter fuel tax payment due - monthly | | 8/17/2020 12:00 AM | 8/17/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-17-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics | 1951 |
| Blenders fuel tax return due - intermittent monthly | | 8/17/2020 12:00 AM | 8/17/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-17-Blenders-fuel-tax-return-due-intermittent-monthly.ics | 1952 |
| Sales and use tax return due - early monthly | | 8/20/2020 12:00 AM | 8/20/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-20-Sales-and-use-tax-return-due-early-monthly.ics | 1953 |
| Aviation fuel tax return due - monthly | | 8/20/2020 12:00 AM | 8/20/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-20-Aviation-fuel-tax-return-due-monthly.ics | 1954 |
| Wisconsin e-File, Wisconsin Telefile and My Tax Account file outage all day | | 8/30/2020 12:00 AM | 8/30/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-20-Wisconsin-e-File-Wisconsin-Telefile-and-My-Tax-Account-file-outage-all-day.ics | 1955 |
| Sales and use tax return due - monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-20-Sales-and-use-tax-return-due-monthly.ics | 1956 |
| WT-6 deposit report due - semi-monthly, monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-20-WT-6-deposit-report-due-semi-monthly-monthly.ics | 1957 |
| Local expo tax return due - monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-31-Local-expo-tax-return-due-monthly.ics | 1958 |
| Premier resort tax return due - monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-31-Premier-resort-tax-return-due-monthly.ics | 1959 |
| Police and fire protection fee due - monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-31-Police-and-fire-protection-fee-due-monthly.ics | 1960 |
| Alternate fuel, terminal operator return due - monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-31-Alternate-fuel-terminal-operator-return-due-monthly.ics | 1961 |
| Supplier-shipper-transporter fuel tax return due - monthly | | 8/31/2020 12:00 AM | 8/31/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-08-31-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics | 1962 |
| State Holiday - Offices Closed | | 9/7/2020 12:00 AM | 9/7/2020 11:59 PM | | Yes | | 1859 |
| My Tax Account, Wisconsin Telefile and Wis e-File system file outage all day | | 9/7/2020 12:00 AM | 9/7/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-09-07-My-Tax-Account-Wisconsin-Telefile-and-Wis-e-File-system-file-outage-all-day.ics | 1965 |
| My Tax Account, Wisconsin Telefile and Wis e-File system file outage all day | | 9/8/2020 12:00 AM | 9/8/2020 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/TaxProfessionals/2020-09-08-My-Tax-Account-Wisconsin-Telefile-and-Wis-e-File-system-file-outage-all-day.ics | 1966 |
| State Holiday - Offices Closed | | 11/26/2020 12:00 AM | 11/26/2020 11:59 PM | | Yes | | 1860 |
| State Holiday - Offices Closed | | 12/24/2020 12:00 AM | 12/24/2020 11:59 PM | | Yes | | 1861 |
| State Holiday - Offices Closed | | 12/25/2020 12:00 AM | 12/25/2020 11:59 PM | | Yes | | 1862 |
| State Holiday - Offices Closed | | 12/31/2020 12:00 AM | 12/31/2020 11:59 PM | | Yes | | 1863 |
| State Holiday - Offices Closed | | 1/1/2021 12:00 AM | 1/1/2021 11:59 PM | | Yes | | 1864 |
