How do I file my taxes if I cannot access my AGI from last year?
See this FAQ
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/01/25947
The below TurboTax FAQ lists a few options on how you can find last year's AGI:
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/00/25947