My overpayment for 2019 was carried over to 2020, where do I enter that amount? It isn't really isn't an "estimated" payment.

[VolvoGirl]

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.

Federal on left

Deductions and Credits at top

Then scroll way down to Estimates and Other Taxes Paid

Other Income Taxes - Click the Start or Revisit

Next page scroll down to 2019 Refund Applied to 2020

Click Start or Update by the tax you applied