Did you print a copy of your 2020 tax return? If you did, then on your 2020 tax return, your AGI is on line 11 of the Form 1040. Also, see the following
What if I forgot my User ID or password?
https://ttlc.intuit.com/community/account-recovery/help/forgot-your-turbotax-online-user-id-or-passw...
