I didnt work in 2020 and i dont know my agi

[DoninGA]

If you did not file a 2020 tax return then indicate you did not file.

Or enter a 0 (zero) for the 2020 AGI

[VolvoGirl]

If you did not file a 2020 tax return your AGI is 0.

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

[falardeau2010-ho]

I did and nothing