File Wisconsin Business Taxes with Confidence
File your business return with guided support, clear deadlines, and expert review before submission.
Not sure what you need?
We'll help you choose the right filing path based on your business type, state requirements, and tax situation.
Business Type
Choose the filing path that matches your entity, whether it's an LLC, partnership, S-Corp, or C-Corp.
State Rules
Understand what may apply in your state based on your business activity and filing requirements.
Federal + State Support
Prepare your federal return and add state filing support when required.
Deadline Help
Stay aware of key filing dates, extension options, and next steps before you submit.
Four steps. Built to get accepted.
From first click to state acceptance - no manual data entry, no guesswork.
01
Pick your return
Choose the right form and filing path in seconds.
02
Auto-fill from CCH Axcess, QuickBooks, or Xero
Connect your data source; no manual data entry, no guesswork.
03
Review state requirements
Check state-specific items, nexus, and deadlines before you file.
04
Validate & e-file
Pre-checks run automatically, then submit with confidence.
Key business tax deadlines
Stay on track with our calendar.
DEADLINE
DESCRIPTION
Filing PERIOD
April 15
Federal Corporation Return (Form 1120)
Annual
March 15
Federal S Corporation Return (Form 1120S)
Annual
April 15
Wisconsin Corporation Franchise or Income Tax Return (Form 5)
Annual
March 15
Partnership Return (Form 1065)
Annual
X.TAX: Your state tax filing solution
Built for accountants and business owners who value speed, accuracy, and compliance.
Automated form generation for state-specific returns
Direct e-filing to your state tax agency
Audit-ready reports and compliance tracking
Start Filing Now
faq
Frequently asked questions
Do I need to file a state business tax return?
State filing requirements depend on your business type, where you operate, and your state’s tax rules. Review your state’s requirements before filing.
Which state business returns can I file with X.TAX?
Is X.TAX an authorized e-file provider for state returns?
When is my state business tax return due?
Can I import bookkeeping data for my state filing?
Can I get help with a state filing question?
Does X.TAX support filing in my state?
Still have questions?
