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10/22/2018 12:00 AM10/22/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-22-Sales-and-Use-tax-return-due-early-monthly.ics1567Sales and use tax return due - early monthly
  
10/22/2018 12:00 AM10/22/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-22-Aviation-fuel-tax-return-due-monthly-quarterly.ics1568Aviation fuel tax return due - monthly, quarterly
  
10/25/2018 12:00 AM10/25/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-25-3rd-quarter-dry-cleaning-fee-returns-due.ics15693rd quarter dry cleaning fee returns due
  
10/28/2018 5:00 AM10/28/2018 12:00 PM/EventDownloads/Businesses/2018-10-28-MTA-Telefile-WI-efile-Outages.ics1392My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Sales-and-Use-tax-return-due-monthly-and-quarterly.ics1570Sales and use tax return due - monthly and quarterly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics1571WT-6 deposit report due - semi-monthly, monthly and quarterly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Local-expo-tax-return-due-monthly-and-quarterly.ics1572Local expo tax return due - monthly and quarterly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Premier-resort-tax-return-due-monthly-and-quarterly.ics1573Premier resort tax return due - monthly and quarterly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Police-and-fire-protection-fee-due-monthly.ics1574Police and fire protection fee due - monthly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Rental-vehicle-tax-return-due-quarterly.ics1575Rental vehicle tax return due - quarterly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics1576Alternate fuel, terminal operator return due - monthly, quarterly
  
10/31/2018 12:00 AM10/31/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-10-31-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics1577Supplier, shipper, transporter fuel tax return due - monthly
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-WT-6-deposit-report-due-semi-monthly.ics1578WT-6 deposit report due - semi-monthly
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-PW-1-estates-and-trusts-extension-deadline.ics1579PW-1 (Estates and trusts) extension deadline
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-Corporation-tax-return-extension-deadline-non-combined-and-combined.ics1580Corporation tax return extension deadline (Non-combined and combined)
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-Cigarette-tobacco-products-return-due-monthly.ics1581Cigarette/tobacco products return due - monthly
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-Liquor-beer-return-due-monthly.ics1582Liquor/beer return due - monthly
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics1583Supplier, shipper, transporter fuel tax payment due - monthly
  
11/15/2018 12:00 AM11/15/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics1584Blenders fuel tax return due - intermittent monthly
  
11/18/2018 5:00 AM11/18/2018 12:00 PM/EventDownloads/Businesses/2018-11-18-MTA-Telefile-WI-efile-Outages.ics1393My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
11/20/2018 12:00 AM11/20/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-20-Sales-and-Use-tax-return-due-early-monthly.ics1585Sales and use tax return due - early monthly
  
11/20/2018 12:00 AM11/20/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-20-Aviation-fuel-tax-return-due-monthly.ics1586Aviation fuel tax return due - monthly
  
11/22/2018 12:00 AM11/22/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-22-State-of-Wisconsin-holiday-Revenue-offices-closed.ics1532State of Wisconsin holiday - Revenue offices closed
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-30-Sales-and-Use-tax-return-due-monthly.ics1587Sales and use tax return due - monthly
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-30-WT-6-deposit-report-due-semi-monthly-and-monthly.ics1588WT-6 deposit report due - semi-monthly, monthly
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-31-Local-expo-tax-return-due-monthly.ics1589Local expo tax return due - monthly
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-30-Premier-resort-tax-return-due-monthly.ics1590Premier resort tax return due - monthly
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-30-Police-and-fire-protection-fee-due-monthly.ics1591Police and fire protection fee due - monthly
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-30-Alternate-fuel-terminal-operator-return-due-monthly.ics1592Alternate fuel, terminal operator return due - monthly
  
11/30/2018 12:00 AM11/30/2018 11:59 PMYeshttps://revenue-auth-prod.wi.gov/EventDownloads/Businesses/2018-11-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics1593Supplier, shipper, transporter fuel tax return due - monthly
  
12/9/2018 5:00 AM12/9/2018 12:00 PM/EventDownloads/Businesses/2018-12-09-MTA-Telefile-WI-efile-Outages.ics1394My Tax Account,  Wisconsin Telefile and Wis e-File system file outage
  
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