If you need to make a change to an already accepted Montana state return, you must file an amended return.
How do I generate an amended return for Montana?
To generate your amended state return, please follow the steps below.
- Select 2024 Amended Return from the navigation bar
- Pay for your amended return
- Read the "Filing an Amended Return" page, then press continue
- Select Amend State Return(s)
- Select "Amended State" from within the white box
- Scroll to the bottom of your state return menu and select Amended Return
- Select "Yes" to the question - "Do you want to file an Amended Return?".
- Complete the "Complete Amended Return" section
What if I received a refund from my original Montana return?
If you received a refund from the state, you must report the amount on your amended return so it is included in your amended return's calculation. To do so, follow the pathway above to navigate to the Amended Return section of your state return. Next, select Complete Amended Return and enter your refund amount in the box labeled "Amount of Original Refund Received".
What if I originally owed state taxes?
If you made a tax payment after your original state return was accepted, you must report it on your amended return so the amount is included in your calculations. To do so, follow the pathway above to navigate to the Amended Return section of your state return. Next, select "Review and Complete Amended Return and enter your payment amount in the box labeled "Amount of Tax Paid with Original Return."
How do I file my amended Montana return?
Amended state returns must be paper filed. To print your amended return select Summary/Print from the navigation bar followed by View Return once you are on the Tax Return Summary. Selecting View Return generates your PDF which contains your amended state return. Simply print, sign, and mail your amended Montana return to paper file it.
Only the amended return (not the originally filed return) and copies of supporting documents (W-2’s, 1099’s, etc.) that support the reason for the change to the tax return need to be mailed unless the state or IRS specifically ask for other documents. View and compare your original and amended pdf's to see the changes.
Additional Information
When you file an amended return you must provide an explanation regarding what it is you changed. Please make sure to provide your explanation when completing your amended return(s).