How do I amend my 2024 Colorado state tax return to fix the state underpayment penalty?
Some Colorado TurboTax customers have overpaid their state taxes due to an error with the Estimated Tax Calculation.
If we notified you, we recommend you submit an amended state tax return as soon as possible. By filing an amended return, you’ll be able to get the money back in your pocket where it belongs!
To correct your return, please follow the steps below.
Use TurboTax to amend your state tax return.
Enter “TO CORRECT THE UNDERPAYMENT PENALTY” as the reason for amending.
Follow the instructions provided by TurboTax to efile the amended state tax return.
Save a copy of your amended state tax return for your records.
If you have questions, call 844-333-2161 (Monday–Friday, 6 AM to 6 PM MT) to speak with an expert. Mention 2024 CO Underpayment of Estimated Tax Calculation so they know what you’re calling about.




