IF you filed jointly last year, then you put the exact same AGI for both of you.
Either both of you as zero's (especially if you mailed it in late in the year)
......or both as line 11 from your 2020 Form 1040.
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We can't tell you exactly which will work, since we can't know the details of when the IRS actually processed that file. Late-processed tax returns, many times, do not get their AGI values transferred into the E-filing computer system, that's why a zero is sometimes used.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
