Applying 2019 overpayment to 2020 estimated state tax return

The overpayment from your 2019 state tax return that you applied to 2020 will serve as a credit against your 2020 state tax liability and has to be entered in TurboTax in the Federal section. It will flow through to your state return.

You can enter the amount applied to your 2020 tax by following these steps:

1. In TurboTax, open your tax return
2. Click on Federal in the left-hand column, then Deductions & Credits on top of the screen
3. Scroll down to All tax breaks, locate the section named Estimates and Other Taxes Paid and click Show more
4. Click on Start next to Income taxes Paid
5. On the next page, click Start next to 2019 refund applied to 2020 state taxes.