Businesses Calendar

Date
  
Title
  
Description
Start Date
  
End Time
  
Location
  
All Day Event
  
  
ICS Download File
  
ID
  
Title
  
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-1CNP-extension-deadline.ics34501CNP extension deadline
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-1CNS-extension-deadline.ics34511CNS extension deadline
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-S-Corporation-tax-return-extension-deadline.ics3452S Corporation tax return extension deadline
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-Exempt-employees-trust-ISA-MSA-Fiduciary-tax-return-extension-deadline.ics3453Exempt employees trust, ISA, MSA Fiduciary tax return extension deadline
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-PW-1-(Partnerships)-extension-deadline.ics3454PW-1 (Partnerships) extension deadline
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-PW-1-(S-Corps)-extension-deadline.ics3455PW-1 (S Corps) extension deadline
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-Cigarette-tobacco-products-return-due-monthly-quarterly.ics3456Cigarette, tobacco products return due - monthly, quarterly
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-Liquor-beer-return-due-monthly.ics3457Liquor, beer return due - monthly
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3458Supplier, shipper, transporter fuel tax payment due - monthly
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics3459Blenders fuel tax return due - intermittent monthly
  
10/15/2026 12:00 AM10/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-15-Wine-direct-shippers-return-due-quarterly.ics3460Wine direct shippers return due - quarterly
  
10/20/2026 12:00 AM10/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-20-Sales-and-use-tax-return-due-early-monthly.ics3461Sales and use tax return due - early monthly
  
10/20/2026 12:00 AM10/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-20-Aviation-fuel-tax-return-due-monthly-quarterly.ics3462Aviation fuel tax return due - monthly, quarterly
  
10/25/2026 12:00 AM10/25/2026 11:59 PMYes3395WisTax, Wisconsin Telefile and My Tax Account outage
  
10/26/2026 12:00 AM10/26/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-10-26-3rd-quarter-dry-cleaning-fee-returns-due.ics34633rd quarter dry cleaning fee returns due
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-Sales-and-use-tax-return-due-monthly-and-quarterly.ics3464Sales and use tax return due - monthly and quarterly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-WT-6-deposit-report-due-semi-monthly-monthly-and-quarterly.ics3465WT-6 deposit report due - semi-monthly, monthly and quarterly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-Local-expo-tax-return-due-monthly-and-quarterly.ics3466Local expo tax return due - monthly and quarterly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-Premier-resort-tax-return-due-monthly-and-quarterly.ics3467Premier resort tax return due - monthly and quarterly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-911-fee-due-monthly.ics3468911 fee due - monthly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-Rental-vehicle-tax-return-due-quarterly.ics3469Rental vehicle tax return due - quarterly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-Alternate-fuel-terminal-operator-return-due-monthly-quarterly.ics3470Alternate fuel, terminal operator return due - monthly, quarterly
  
11/2/2026 12:00 AM11/2/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-02-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics3471Supplier, shipper, transporter fuel tax return due - monthly
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-WT-6-deposit-report-due-semi-monthly.ics3472WT-6 deposit report due - semi-monthly
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-PW-1-(Estates-and-trusts)-extension-deadline.ics3473PW-1 (Estates and trusts) extension deadline
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-Corporation-tax-return-extension-deadline-(Non-combined-and-combined).ics3474Corporation tax return extension deadline (Non-combined and combined)
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-Cigarette-tobacco-products-return-due-monthly.ics3475Cigarette, tobacco products return due - monthly
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-Liquor-beer-return-due-monthly.ics3476Liquor, beer return due - monthly
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3477Supplier, shipper, transporter fuel tax payment due - monthly
  
11/16/2026 12:00 AM11/16/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-16-Blenders-fuel-tax-return-due-intermittent-monthly.ics3478Blenders fuel tax return due - intermittent monthly
  
11/20/2026 12:00 AM11/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-20-Sales-and-use-tax-return-due-early-monthly.ics3479Sales and use tax return due - early monthly
  
11/20/2026 12:00 AM11/20/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-20-Aviation-fuel-tax-return-due-monthly.ics3480Aviation fuel tax return due - monthly
  
11/22/2026 12:00 AM11/22/2026 11:59 PMYes3396WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
  
11/26/2026 12:00 AM11/26/2026 11:59 PMYes3481State of Wisconsin holiday - Revenue offices closed
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-Sales-and-use-tax-return-due-monthly.ics3482Sales and use tax return due - monthly
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-WT-6-deposit-report-due-semi-monthly-monthly.ics3483WT-6 deposit report due - semi-monthly, monthly
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-Local-expo-tax-return-due-monthly.ics3484Local expo tax return due - monthly
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-Premier-resort-tax-return-due-monthly.ics3485Premier resort tax return due - monthly
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-911-fee-due-monthly.ics3486911 fee due - monthly
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-Alternate-fuel-terminal-operator-return-due-monthly.ics3487Alternate fuel, terminal operator return due - monthly
  
11/30/2026 12:00 AM11/30/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-11-30-Supplier-shipper-transporter-fuel-tax-return-due-monthly.ics3488Supplier, shipper, transporter fuel tax return due - monthly
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-WT-6-deposit-report-due-semi-monthly.ics3489WT-6 deposit report due - semi-monthly
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-Exempt-corporation-tax-return-extension-deadline.ics3490Exempt corporation tax return extension deadline
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-Exempt-non-employees-trust-IRA-MSA-Fiduciary-tax-return-extension-deadline.ics3491Exempt non-employee's trust, IRA, MSA Fiduciary tax return extension deadline
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-Cigarette-tobacco-products-return-due-monthly.ics3492Cigarette, tobacco products return due - monthly
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-Liquor-beer-return-due-monthly.ics3493Liquor, beer return due - monthly
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-Supplier-shipper-transporter-fuel-tax-payment-due-monthly.ics3494Supplier, shipper, transporter fuel tax payment due - monthly
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-Blenders-fuel-tax-return-due-intermittent-monthly.ics3495Blenders fuel tax return due - intermittent monthly
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-15-4th-pass-through-withholding-estimated-payment-due.ics34964th pass-through withholding estimated payment due
  
12/15/2026 12:00 AM12/15/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-15-15-4th-corporation-estimated-payment-due.ics34974th corporation estimated payment due
  
12/20/2026 12:00 AM12/20/2026 11:59 PMYes3397WisTax, Wisconsin Telefile and My Tax Account outage 5am-noon
  
12/21/2026 12:00 AM12/21/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-21-Sales-and-use-tax-return-due-early-monthly.ics3498Sales and use tax return due - early monthly
  
12/21/2026 12:00 AM12/21/2026 11:59 PMYeshttps://www.revenue.wi.gov/EventDownloads/Businesses/2026-12-21-Aviation-fuel-tax-return-due-monthly.ics3499Aviation fuel tax return due - monthly
  
12/24/2026 12:00 AM12/24/2026 11:59 PMYes3500State of Wisconsin holiday - Revenue offices closed
  
12/25/2026 12:00 AM12/25/2026 11:59 PMYes3501State of Wisconsin holiday - Revenue offices closed
  
12/31/2026 12:00 AM12/31/2026 11:59 PMYes3502State of Wisconsin holiday - Revenue offices closed
  
1/1/2027 12:00 AM1/1/2027 11:59 PMYes3503State of Wisconsin holiday - Revenue offices closed
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