2.
I suggest you pay using the directions the IRS sent you in the notice. They DO NOT want you to amend.
Next, you can then TELL TURBOTAX that you are amending the 2021 Federal return to make the changes, select that you are MAILING in the 1040X (BUT DON'T MAIL IT)
The TurboTax 2021 tax file will reflect the changes you had to make. It probably will not make any difference with your 2022 return, but will be accurate in case you need to look back at it or use it for personal financial reasons, such as a bank loan.
Use your AGI from the Original Return if that is needed to efile your 2022 Tax Year return.
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