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12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-WT-6-deposit-report-due-semi-monthly.ics1594WT-6 deposit report due - semi-monthly
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-Exempt-corporation-tax-return-extension-deadline.ics1595Exempt corporation tax return extension deadline
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-Exempt-non-employees-trust-IRA-MSA-fiduciary-tax-return-extension-deadline.ics1596Exempt non-employee's trust, IRA, MSA Fiduciary  tax return extension deadline
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-Cigarette-tobacco-products-return-due-monthly.ics1597Cigarette/tobacco products return due - monthly
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-Liquor-beer-return-due-monthly.ics1598Liquor/beer return due - monthly
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics1599Supplier, shipper, transporter fuel tax payment due - monthly
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-Blenders-fuel-tax-return-due-intermittent-monthly.ics1600Blenders fuel tax return due - intermittent monthly
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-4th-pass-through-withholding-estimated-payment-due.ics16014th pass-through withholding estimated payment due
  
12/17/2018 12:00 AM12/17/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-17-4th-corporation-estimated-payment-due.ics16024th corporation estimated payment due
  
12/20/2018 12:00 AM12/20/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-20-Sales-and-Use-tax-return-due-early-monthly.ics1603Sales and use tax return due - early monthly
  
12/20/2018 12:00 AM12/20/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-20-Aviation-fuel-tax-return-due-monthly.ics1604Aviation fuel tax return due - monthly
  
12/24/2018 12:00 AM12/24/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-24-State-of-Wisconsin-holiday-Revenue-offices-closed.ics1533State of Wisconsin holiday - Revenue offices closed
  
12/25/2018 12:00 AM12/25/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-25-State-of-Wisconsin-holiday-Revenue-offices-closed.ics1534State of Wisconsin holiday - Revenue offices closed
  
12/31/2018 12:00 AM12/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-31-State-of-Wisconsin-holiday-Revenue-offices-closed.ics1535State of Wisconsin holiday - Revenue offices closed
  
12/31/2018 12:00 AM12/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-12-31-Qualified-Wisconsin-Business-registration-deadline.ics1605Qualified Wisconsin Business registration deadline
  
1/1/2019 12:00 AM1/1/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-01-State-of-Wisconsin-holiday-Revenue-offices-closed.ics1536State of Wisconsin holiday - Revenue offices closed
  
1/2/2019 12:00 AM1/2/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-02-Qualified-Wisconsin-Business-Registration.ics1633Qualified Wisconsin Business Registration deadline
  
1/2/2019 12:00 AM1/2/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-02-Sales-and-Use-tax-return-due-monthly.ics1634Sales and use tax return due - monthly
  
1/2/2019 12:00 AM1/2/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-02-WT-6-deposit-report-due-semimonthly-monthly.ics1635WT-6 deposit report due - semi-monthly, monthly
  
1/2/2019 12:00 AM1/2/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-02-Alternate-fuel-terminal-operator-return-due-monthly.ics1636Alternate fuel, terminal operator return due - monthly
  
1/2/2019 12:00 AM1/2/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-02-SupplierShipper-fuel-tax-return-due-monthly.ics1637Supplier, shipper, transporter fuel tax return due - monthly
  
1/6/2019 5:00 AM1/6/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-06-Winpas-Outage.ics1606My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
1/12/2019 12:00 AM1/12/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-12-Winpas-Outage.ics1607My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
1/13/2019 12:00 AM1/13/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-13-Winpas-Outage.ics1609My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
1/15/2019 12:00 AM1/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-15-WT-6-deposit-report-due-semimonthly.ics1639WT-6 deposit report due - semi-monthly
  
1/15/2019 12:00 AM1/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-15-Cigarette-tobacco-products-return-due-monthly-quarterly.ics1640Cigarette, tobacco products return due - monthly, quarterly
  
1/15/2019 12:00 AM1/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-15-Liquor-beer-return-due-monthly.ics1641Liquor/beer return due - monthly
  
1/15/2019 12:00 AM1/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-15-SupplierShipper-fuel-tax-payment-due-monthly.ics1642Supplier, shipper, transporter fuel tax payment due - monthly
  
1/15/2019 12:00 AM1/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-15-blenders-fuel-tax-return-due-intermittent-monthly.ics1643Blenders fuel tax return due - intermittent monthly
  
1/15/2019 12:00 AM1/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-15-Wine-direct-shippers-return-due.ics1644Wine direct shippers return due - quarterly
  
1/21/2019 12:00 AM1/21/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-21-State-Offices-Closed.ics1630State Holiday - Offices Closed
  
1/22/2019 12:00 AM1/22/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-22-Sales-and-Use-tax-return-due-early-monthly.ics1645Sales and use tax return due - early monthly
  
1/22/2019 12:00 AM1/22/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-22-aviation-fuel-tax-return-due-monthly-quarterly.ics1646Aviation fuel tax return due - monthly, quarterly
  
1/25/2019 12:00 AM1/25/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-25-4th-quarter-dry-cleaning-fee-returns-due.ics16474th quarter dry cleaning fee returns due
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-Sales-and-Use-tax-return-due-monthly-quarterly-annual.ics1648Sales and use tax return due - monthly, quarterly and annual
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-WT-6-deposit-report-due-semimonthly-monthly-quarterly.ics1649WT-6 deposit report due - semi-monthly, monthly and quarterly
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-WT-7-reconciliation-due-including-wage-statements-information-returns.ics1650WT-7 reconciliation due, including wage statements and information returns
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-Local-expo-tax-return-due-monthly-quarterly-annual.ics1651Local expo tax return due - monthly, quarterly, annual
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-Premier-resort-tax-return-due-monthly-quarterly-annual.ics1652Premier resort tax return due - monthly, quarterly, annual
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-Rental-vehicle-tax-return-due-quarterly.ics1653Rental vehicle tax return due - quarterly
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-PW-2-due-S-Corps.ics1654PW-2 due (S Corps)
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-Police-and-fire-protection-fee-due-monthly.ics1655Police and fire protection fee due - monthly
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics1656Alternate fuel, terminal operator return due - monthly, quarterly
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-SupplierShipper-fuel-tax-return-due-monthly.ics1657Supplier, shipper, transporter fuel tax return due - monthly
  
1/31/2019 12:00 AM1/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-01-31-PW-2-due-S-Partnerships.ics1658PW-2 due (Partnerships)
  
2/3/2019 5:00 AM2/3/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-03-Winpas-Outage.ics1610My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
2/15/2019 12:00 AM2/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-15-WT-6-deposit-report-due-semimonthly.ics1659WT-6 deposit report due - semi-monthly
  
2/15/2019 12:00 AM2/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-15-Cigarette-tobacco-products-return-due-monthly.ics1660Cigarette/tobacco products return due - monthly
  
2/15/2019 12:00 AM2/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-15-Liquor-beer-return-due-monthly.ics1661Liquor/beer return due - monthly
  
2/15/2019 12:00 AM2/15/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-15-SupplierShipper-fuel-tax-payment-due-monthly.ics1662Supplier, shipper, transporter fuel tax payment due - monthly
  
2/20/2019 12:00 AM2/20/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-20-blenders-fuel-tax-return-due-intermittent-monthly.ics1663Blenders fuel tax return due - intermittent monthly
  
2/20/2019 12:00 AM2/20/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-20-Sales-and-Use-tax-return-due-early-monthly.ics1664Sales and use tax return due - early monthly
  
2/20/2019 12:00 AM2/20/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-20-aviation-fuel-tax-return-due-monthly.ics1665Aviation fuel tax return due - monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-Sales-and-Use-tax-return-due-monthly.ics1666Sales and use tax return due - monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-WT-6-deposit-report-due-semimonthly-monthly.ics1667WT-6 deposit report due - semi-monthly and monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-Local-expo-tax-return-due-monthly.ics1668Local expo tax return due - monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-Premier-resort-tax-return-due-monthly.ics1669Premier resort tax return due - monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-29-PW-2-due-estates-and-trusts.ics1670PW-2 due (Estates and trusts)
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-Police-and-fire-protection-fee-due-monthly.ics1671Police and fire protection fee due - monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-Alternate-fuel-terminal-operator-return-due-monthly.ics1672Alternate fuel, terminal operator return due - monthly
  
2/28/2019 12:00 AM2/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-02-28-SupplierShipper-fuel-tax-return-due-monthly.ics1673Supplier, shipper, transporter fuel tax return due - monthly
  
3/3/2019 5:00 AM3/3/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-03-03-Winpas-Outage.ics1611My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
3/20/2019 8:30 AM3/20/2019 4:00 PMLocation to be determined, Appleton, WIhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-03-20-AGC-Contractor-SU-Seminar.ics1631Contractor Sales and Use Tax Seminars hosted by AGC of Wisconsin
  
3/27/2019 8:30 AM3/27/2019 4:00 PMAGC of Wisconsin Inc, 4814 E Broadway, Madison, WI  53716https://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-03-27-AGC-Contractor-SU-Seminar.ics1632Contractor Sales and Use Tax Seminars hosted by AGC of Wisconsin
  
5/5/2019 5:00 AM5/5/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-05-05-Winpas-Outage.ics1612My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
5/27/2019 12:00 AM5/27/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-05-27-State-Offices-Closed.ics1622State Holiday - Offices Closed
  
6/8/2019 12:00 AM6/8/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-06-08-Winpas-Outage.ics1613My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
6/9/2019 12:00 AM6/9/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-06-09-Winpas-Outage.ics1614My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
7/4/2019 12:00 AM7/4/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-07-04-State-Offices-Closed.ics1623State Holiday - Offices Closed
  
7/7/2019 5:00 AM7/7/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-07-07-Winpas-Outage.ics1615My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
8/4/2019 5:00 AM8/4/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-08-04-Winpas-Outage.ics1616My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
9/2/2019 12:00 AM9/2/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-09-02-State-Offices-Closed.ics1624State Holiday - Offices Closed
  
9/7/2019 12:00 AM9/7/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-09-07-Winpas-Outage.ics1617My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
9/8/2019 12:00 AM9/8/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-09-08-Winpas-Outage.ics1618My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
10/27/2019 5:00 AM10/27/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-10-27-Winpas-Outage.ics1619My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
11/10/2019 5:00 AM11/10/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-11-10-Winpas-Outage.ics1620My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
11/28/2019 12:00 AM11/28/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-11-28-State-Offices-Closed.ics1625State Holiday - Offices Closed
  
12/8/2019 5:00 AM12/8/2019 12:00 PMhttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-12-08-Winpas-Outage.ics1621My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
12/24/2019 12:00 AM12/24/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-12-24-State-Offices-Closed.ics1626State Holiday - Offices Closed
  
12/25/2019 12:00 AM12/25/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-12-25-State-Offices-Closed.ics1627State Holiday - Offices Closed
  
12/31/2019 12:00 AM12/31/2019 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2019-12-31-State-Offices-Closed.ics1628State Holiday - Offices Closed
  
1/1/2020 12:00 AM1/1/2020 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2020-01-01-State-Offices-Closed.ics1629State Holiday - Offices Closed