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How to File a Wisconsin Tax Amendment

Wisconsin State Taxes
amend Wisconsin taxes
Wisconsin
"The Badger State"

When Do I Need to File An Amended Wisconsin Tax Return?

If IRS made adjustments to your income, you must report the changes to Wisconsin Department of Revenue by filing a tax amendment form within 90 days of notification. If you don't file an amendment form, then the Wisconsin Department of Revenue will do it for you, but you will have to pay interest on the unpaid tax.

In Wisconsin you are allowed to file an amended return and get a refund within a period of 4 years since the original due date of the tax return.

How Do I Fix My Accepted Wisconsin Tax Return or File a Tax Amendment in Wisconsin?

You will need to file a Wisconsin tax amendment form if you need to make any changes to your Wisconsin return or if you made changes to your federal return that affects your Wisconsin return. Follow these instructions on how to amend your Wisconsin tax return: :

  1. Download and complete Form 1 (residents) or Form 1NPR (nonresidents and part-year residents).
  2. Print out the form and mail it to: Wisconsin Department of Revenue, P.O. Box 8991, Madison WI 53708-8991.

Wisconsin Tax Forms (Download, Fill Out, Print Out, and Mail)

If you are a full-year resident of the state of Wisconsin, then you should fill out Form 1 and check the box to indicate that it's an amended tax return. For Tax Years 2014 and earlier, use Form 1X. 

A full-year resident is a person who is domiciled in Wisconsin for the Tax Year in question. The state of Wisconsin defines domicile as a legal residence, or a place that is someone's real, legal home where one plans to stay for an indefinite period of time and would return to after being away. It is only possible for a person to have one domicile in one specific period of time, and a person can live in one place but be domiciled in another.

If you are a part-year resident or a nonresident of the state of Wisconsin, then you should fill out Form 1NPR. A part-year resident is a person who is domiciled in Wisconsin only for part of the tax year in question. A nonresident is a person who is not domiciled in Wisconsin.

Resident Forms

Form (Tax Year) Description
Form 1 (2017) Wisconsin Resident Amended Return
Form 1 (2016) Wisconsin Resident Amended Return
Form 1 (2015) Wisconsin Resident Amended Return
Form 1X (2014) Wisconsin Resident Amended Return
Form 1X (2013) Wisconsin Resident Amended Return
Form 1X (2012) Wisconsin Resident Amended Return

Nonresident and Part-Year Resident Forms

Form (Tax Year) Description
Form 1NPR (2017) Wisconsin Nonresident & Part Year Resident Tax Return
Form 1NPR (2016) Wisconsin Nonresident & Part-Year Resident Tax Return
Form 1NPR (2015) Wisconsin Nonresident & Part-Year Resident Tax Return
Form 1NPR (2014) Wisconsin Nonresident & Part-Year Resident Tax Return
Form 1NPR (2013) Wisconsin Nonresident & Part-Year Resident Tax Return
Form 1NPR (2012) Wisconsin Nonresident & Part-Year Resident Tax Return

How Do I Check the Status of My Wisconsin Tax Amendment?

Call the Wisconsin Department of Revenue at (608) 266-2486.

What Are the Penalties, Interest, and Fees Related to Amended Wisconsin Tax Returns?

The state of Wisconsin has penalties that include a late-filing fee, delinquent interest, and a negligence penalty.

A late-filing fee is when you fail to file your taxes on time and it amounts to $50. Wisconsin charges interest on unpaid tax that is due.

Interest rate is 1.5% per month, or 18% per year, but if an extension is filed, the interest during the extension period is 1% per month, or 12% per year.

A negligence penalty is assessed when you fail to file your tax on time, and is 5% per month, but no more than 25% of the tax in total.

Where Do I Mail My Wisconsin State Tax Amendment? - Wisconsin Mailing Address:

Wisconsin Department of Revenue
P.O. Box 8991
Madison WI 53708-8991

Wisconsin Department of Revenue Phone Number: (608) 266-2486

Wisconsin Department of Revenue

Where Do I Find More Information on Wisconsin State Income Taxes?

How Do I Just File My Wisconsin Tax Return?

Where is my Wisconsin State Tax Refund?

Wisconsin Tax Extension

Wisconsin State Taxes

What If I Need to Correct My Accepted Federal Tax Return?

Learn how to amend your IRS tax return.