Federal 2020 refund of $2104 was applied to my Federal 2021 estimated payments. Should this $2104 refund amount be entered as the 2021 First quarter estimated payment?

No, you do not enter the amount of refund applied to the 2021 taxes as an estimated tax payment.

 

To enter, change or delete a refund from the prior year applied to this years taxes (Federal, State, Local) -

• Click on Federal Taxes (Personal using Home and Business)
• Click on Deductions and Credits
• Click on I'll choose what I work on (if shown)
• Scroll down to Estimates and Other Taxes Paid
• On Other Income Taxes, click on the start or update button

On the next screen select the options under 2020 Refund Applied to 2021

Or enter refund applied to this year in the Search box located in the upper right of the program screen. Click on Jump to refund applied to this year

The prior year refund amount applied is shown on Form 1040 Line 26

No it has its own spot.

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 2020 Refund Applied to 2021

Click Start or Update by the tax you applied

 

Then for state, you need to click on the state tab and go through state again for it to update.