How to File a Wisconsin Tax Amendment

Amend or change you accepted Wisconsin State Income Tax Return for the current or previous Tax Year, you need to complete Form 1 (residents) or 1NPR (nonresidents and part-year residents). Forms 1 and 1NPR are Forms used for the Tax Amendment. You can prepare a current tax year Wisconsin Tax Amendment on, however you cannot submit it electronically. In comparison, the IRS requires a different Form - Form 1040X - to amend an IRS return (do not use Form 1040 for an IRS Amendment).

The IRS might send you a notification to change an error on your Return, or you might have discovered an error. If you or the IRS amended or changed one of your IRS Tax Return(s), the IRS will report this to the Wisconsin Tax Agency, thus you should file a Wisconsin Amendment within one year.

File a current tax year Wisconsin Tax Amendment
You cannot eFile a WI Tax Amendment anywhere, except mail it in. However, you can prepare it here on
Option 1: Sign into your account, modify your Return and download/print WI Form 1 (residents) or 1NPR (nonresidents and part-year residents) under My Account. Check the "Check here if an amended return" box to report that it's a tax amendment.
Option 2: If you don't have an account follow the step by step instruction on how to prepare a tax return/amendment.
Option 3: If you want to do the math on your own paper return then complete, sign WI Form 1 or 1NPR - Print, Mail the Form to WI Depart. of Revenue to:
Wisconsin Department of Revenue
P.O. Box 8991
Madison WI 53708-8991
Current tax year only: Prepare online on until the October deadline. When done Print, Sign and Mail in - not eFile - Your Tax Amendment, Address Change, etc.
After the October deadline, Prepare, Print, Sign and Mail-In - see address above - your Form 1 or 1NPR.
How to correct a rejected Tax Return
If your WI Tax Return was rejected by the WI Tax Agency - not - instructions on how to correct a rejected Wisconsin Tax Return.
Check Your WI Tax Amendment Status
1. Call the Wisconsin Department of Revenue at (608) 266-2486.
2. Contact the WI Department of Revenue
Wisconsin Refund Deadlines
A. Four years from the due date of the original tax year return, including valid filing extensions.
B. One year from the final determination of the amended federal return or federal change, whichever is later, provided that the allowable refund is not more than the decrease in Wisconsin tax attributable to the federal change or correction.
C. Two years from the payment of an assessment, provided the amended return raises issues relating only to the prior assessment and the refund does not exceed the amount of tax paid on the prior assessment.
D. Two years from the filing of an amended Wisconsin return resulting in the payment of additional tax, provided that the current amended return raises issues relating solely to the prior amended return and that the refund does not exceed the amount of the tax payment made as a result of the prior amended return.
Additional Wisconsin Tax Income Taxes Deadlines
Wisconsin Income Tax Penalties
Find out how Wisconsin Late Filing and Late Payment Penalties are calculated.
For IRS Tax and Late Filing Penalties we have an easy to use tool: The PENALTYucator.
File an IRS Tax Amendment by Tax Year
Instructions on how to prepare an IRS Tax Amendment on, however the IRS does not accept Tax Amendments electronically.

Will I get a bigger tax refund in 2024?

Many taxpayers can expect a bigger tax refund on their 2023 taxes. To help you keep up with soaring inflation, the IRS is making bigger changes than usual that could save you big money on your 2023 taxes, which is the tax return you'll file in 2024.

Take control of your personal life relationships, finances, and taxes: follow the tips on this page and keep up with tax planning for next year. You can use this free Tax Refund Calculator 2023 to get a high-level understanding of your taxes.