What is your question? Use the AGI from your original return.
You need your 2020 AGI to efile 2021. The AGI is on 2020 1040 line 11. If you filed a Joint return you use the same AGI for each spouse.
How to find the AGI.
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/01/25947
If you didn't file 2020 or filed it later in the year or mailed it, then try entering 0 for the AGI. If that doesn't work you will have to print and mail your return.
Or request a transcript from the IRS
https://www.irs.gov/individuals/get-transcript
@ndconditt wrote:
SHOW ME 2020 1040 FORM
You have posted this same issue multiple times and you have been answered multiple times.
The steps for obtaining last year's AGI can be found here @ndconditt.