How to File a Minnesota Tax Amendment

amend Minnesota taxes
“The North Star State“

If you need to change or amend an accepted Minnesota State Income Tax Return for the current or previous Tax Year you need to complete Form M1X. Form M1X is a Form used for the Tax Return and Tax Amendment. You can prepare a 2021 Minnesota Tax Amendment on, however you can not 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 Minnesota Tax Agency, thus you should file a Minnesota Tax Amendment within one year.

File a 2021 Minnesota Tax Amendment
You cannot eFile a MN Tax Amendment anywhere, except mail it in. However, you can prepare it here on
Only Option: You need to complete, sign Form M1X for the appropriate Tax Year you are amending - Print, Mail the Form.
If changes were made to your Minnesota income tax return, mail your amended return to:
Minnesota Amended Individual Income Tax
Processing Center
Mail Station 1060
St. Paul, MN 55145-1060
If no changes were made to your Minnesota income tax return mail your amended return to:
Minnesota Department of Revenue
Mail Station 7703
St. Paul, MN 55146-7703
MN Tax Amendment Form M1X
This Form can be used to file an: Income Tax Return, Tax Amendment, Change of Address. Check the proper check box on the Form.
Step 1: Select the MN Form M1X by Tax Year below
Step 2: Sign, Mail Form M1X to one of the addresses listed above
Tax Year 2021 only: Prepare online on until Oct. 15, 2022. When done Print, Sign and Mail in - not eFile - Your Tax Amendment, Address Change etc.
After Oct. 15 Prepare, Print, Sign and Mail-In - see address above - your Tax Year 2021 - Form M1X.
How to correct a rejected Tax Return
If your MN Tax Return was rejected by the MN Tax Agency - not - instructions on how to correct a rejected Minnesota Tax Return.
Check Your MN Tax Amendment Status
1. Call the Minnesota Department of Revenue at (800) 652-9094
2. Contact the MN Dep. of Revenue
Minnesota Refund Deadlines
A. Three 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 Minnesota 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 Minnesota 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 Minnesota Tax Income Taxes Deadlines
Minnesota Income Tax Penalties
Find out how Minnesota 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.