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Corporation and Partnership Tax

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Taxes and Other Programs

Corporations

  • Common questions – general
  • Combined reporting
  • Publication 102 - Wisconsin Tax Treatment of Tax-Option (S) Corporations and Their Shareholders
  • Tax-option (S) corporation entity level tax

Partnerships

  • Common questions
  • Partnership entity level tax

Other Information

  • Apportionment and nexus
  • Economic development surcharge
  • Limited liability companies (Publication 119)
  • Pass through withholding and composite returns (Fact Sheet 1117)
  • Qualified opportunity zones
  • Qualified Wisconsin business capital gain exclusion/deferral program
  • Starting a business
  • Tax incentives/credits
  • Tax rates
  • Unclaimed property
  • Voluntary disclosure
    • Nonfiler
    ​

External Links (NEW)

  • Department of Financial Institutions
    • Wisconsin entities
    • Out of state entities
  • Internal Revenue Service
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File and Pay

My Tax Account  My Tax Account (MTA)

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Other

  • Amend return
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  • Due dates and extensions
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Resources

  • Common questions
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​​​
ID
  
Title
  
All Day Event
  
Start Date
  
End Time
  
ICS Download File
  
3227
WT-6 deposit report due - semi-monthly
  
Yes11/17/2025 12:00 AM11/17/2025 11:59 PMhttps://www.revenue.wi.gov/EventDownloads/Businesses/2025-11-17-WT-6-deposit-report-due-semi-monthly.ics
3228
PW-1 (Estates and trusts) extension deadline
  
Yes11/17/2025 12:00 AM11/17/2025 11:59 PMhttps://www.revenue.wi.gov/EventDownloads/Businesses/2025-11-17-PW-1-(Estates-and-trusts)-extension-deadline.ics
3230
Corporation tax return extension deadline (Non-combined and combined)
  
Yes11/17/2025 12:00 AM11/17/2025 11:59 PMhttps://www.revenue.wi.gov/EventDownloads/Businesses/2025-11-17-Corporation-tax-return-extension-deadline-(Non-combined-and-combined).ics
3231
Cigarette, tobacco products return due - monthly
  
Yes11/17/2025 12:00 AM11/17/2025 11:59 PMhttps://www.revenue.wi.gov/EventDownloads/Businesses/2025-11-17-Cigarette-tobacco-products-return-due-monthly.ics
3232
Liquor, beer return due - monthly
  
Yes11/17/2025 12:00 AM11/17/2025 11:59 PMhttps://www.revenue.wi.gov/EventDownloads/Businesses/2025-11-17-Liquor-beer-return-due-monthly.ics
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6/16/2025Soliciting Economic and Environmental Impact on Administrative Rule SS 009-24
Rule-SS-009-24-aspx
  
Alcohol, Businesses, Tax Pro2025
5/9/2025DOR Celebrates Small Businesses
Small-Business-Week
  
Businesses, Press Releases2025
4/24/2025New Statewide Operator's Permit Offers Alternative to Traditional Bartender's Licenses
Statewide-Operator-Permit
  
Alcohol, Businesses, Press Releases2025
8/14/2024Treasury Offset Program (TOP) and State Reciprocal Program (SRP)
news-2011-111228
  
Businesses, Individuals, Tax Pro2024
3/25/2024Soliciting Economic and Environmental Impact on Administrative Rule SS 068-23
Rule-SS-068-23
  
Businesses, Individuals, Municipal Officials, Press Releases, Tax Pro2024
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