How Do I Amend a Michigan State Return?

If you need to correct a Michigan return that has already been accepted, you'll need to file an amended Michigan return. Whether you're updating income, deductions, credits, withholding, or other information, the amendment process allows you to make those corrections and report the changes to the state.

Michigan requires taxpayers to explain why they are making changes and include any supporting documentation with the amended return. 

How Do I Generate an Amended Michigan Return?

To create your amended Michigan return in the software:

1. Select 2026 Amended Return from the navigation menu.
2. Pay for your amended return, if applicable.
3. Review the Filing an Amended Return information page and select Continue.
4. Select Amend State Return(s).
5. Choose Amend State within the white box.
6. Scroll to the bottom of the Michigan return menu and select Amended Return.
7. Complete the questions in the Michigan Amended Return section.
8. Complete any additional sections affected by the change.

What If I Received a Refund From My Original Michigan Return?

If you received a refund on your original Michigan return, you must report that refund on the amended return so the amended calculation is accurate.

Navigate to the Michigan Amended Return section and enter the amount in the field labeled:

"Refund/Credit on original Michigan return, if applicable."

Michigan's amended return instructions also require taxpayers to account for any refund or credit previously received when calculating the amended balance due or refund. 

What If I Paid Tax With My Original Michigan Return?

If you made a payment with your original Michigan return, enter that payment in the amended return section so the payment is included in the amended calculations.

Navigate to the Michigan Amended Return section and enter the amount in the field labeled:

"Amount Paid with original Michigan return, if applicable."

Michigan specifies that payments made with the original return should be included when calculating the amended return, but any penalty or interest paid with the original filing should not be included. 

How Do I File an Amended Michigan Return?

Michigan amended individual income tax returns must be printed and mailed.

To print your amended return:

1. Select Summary/Print from the navigation menu.
2. Choose View Return from the Tax Return Summary page.
3. Print the amended Michigan return included in the PDF.
4. Sign the return.
5. Mail it to the Michigan Department of Treasury using the address shown on the return.

Michigan's instructions state that amended returns must include:

• A completed amended MI-1040
• Schedule AMD (Michigan Amended Return Explanation of Changes)
• Any schedules affected by the change
• Supporting documentation
• A copy of the amended federal return if the federal change affects Michigan taxable income 

What Documents Should I Mail?

In most cases, you should mail:

• The amended Michigan return
• Schedule AMD
• Copies of supporting forms such as W-2s, 1099s, or other documents that support the changes
• Any required federal schedules or amended federal return forms

Generally, you do not need to mail a copy of the originally filed Michigan return unless specifically requested by the state. 

Do I Need to Explain My Changes?

Yes. Michigan requires taxpayers filing an amended return to provide a clear explanation of what changed and why the return is being amended. Schedule AMD is used to document those changes. 

Important Michigan Amended Return Rules

• File your amended return within four years of the original return's due date if you are claiming an additional refund. 
• If a federal change affects your Michigan return, you must generally file the Michigan amendment within 120 days of the federal change. 
• Compare your original and amended PDFs before mailing to confirm the changes are correct.

Additional Information