I used TurboTax for my 2020 tax submittal, and then used their amended return process to add a 1099-INT and K-1 beneficiary forms. I had a tax overpayment on my original return of $10,204 which I planned to apply to 2021 estimated payments. The amended return 1040-X summary showed a total tax increase from $77,796 to $82,792 (difference of $4,996). I followed the instructions and sent a check to the IRS for $4,996 with a voucher (Form 1040-V). The amended return 1040-SR revised my 2020 tax overpayment from $10,204 to $5,208 (difference = $4,996). Since the $4,996 in new taxes was taken from my 2020 payments on the amended 1040-SR, was it correct to also send a check for $4,996?
