How do I Amend a Connecticut State Return?

If you need to make a change to an already accepted Connecticut state return, you must file an amended return.

How do I generate an amended return for Connecticut?

To generate your amended state return, please follow the steps below.

1. Select 2024 Amended Return from the navigation bar
2. Pay for your amended return
3. Read the "Filing an Amended Return" page, then press continue
4. Select Amend State Return(s)
5. Select "+Amend State" from within the white box
6. Scroll to the bottom of your state return menu and select Amended Return
7. Select Yes from the drop-down list under "Do you want to file an amended return?" 
8. Complete Amended Return - Proceed through the sections, answering applicable questions

What if I received a refund from my original Connecticut 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 calculations. To do so, follow the pathway above to navigate to Complete Amended Return, then select the Total Payments section. Next, enter your refund amount in the box labeled "Overpayment received from original return."

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 Complete Amended Return, then select the Total Payments section. Next, enter your tax paid amount in the box labeled "Amount paid with Original Return."

How do I file my amended Connecticut 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 Connecticut 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 PDFs to see the changes.

Additional Information

When you file an amended return you must provide an explanation regarding the changes that you made. Please make sure to provide your explanation when completing your amended return(s). Use the path noted above and then select the Explain Changes Menu section. 

Connecticut state instructions