During the actual filing process, the software will ask for ask for last year's AGI.
1) The AGI has to come from line 11 of your "original" 2022 form 1040. i.e. not from a later amended 2022 tax return.
2) IF you filed 2022 late on paper (After the October 2023 final deadline) i.e. did not e-file your 2022 taxes, or did not file 2022 at all, you might need to use a zero as your 2022 AGI.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
