How do I enter 2023 federal tax overpayments for 2024?

If it didn’t transfer over from last year, then enter a refund from last year that you applied to this year here. BUT first make sure it’s not already there. You don’t want to apply it twice. It will be on 1040 line 26.

Federal on left

Deductions and Credits at top

Then scroll way down to Estimates and Other Income Taxes Paid

Other Income Taxes - Click the Start or Revisit

Next page scroll down to 2023 Refund Applied to 2024

Click Start or Update by the tax you applied

If, on your 2023 1040 line 36 you indicated that you wanted to apply your overpayment to 2024, you have an overpayment carryover to 2024.  Here is how you can indicate you have a 2023 federal overpayment carryover to 2024 in TurboTax Online:

1. Navigate to  Federal > Deductions & Credits > Estimates and Other Taxes Paid  > Start or Revisit
2.  On the Income Taxes Paid screen, choose 2023 Refund Applied to 2024  federal taxes > Start or Revisit
3. Enter the amount