Your current 2021 AGI is on 1040 line 11. Before filing, You can preview the 1040 or print the whole return
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
Find the current year AGI
https://ttlc.intuit.com/community/agi/help/where-can-i-find-my-current-year-agi/00/26310
You need your 2020 AGI on the 1040 line 11 to efile 2021. How to find last year's AGI
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/00/25947
