i put in the wrong amount for prior year AGI
If you have already filed you would need to wait for the return to be rejected.
If you have not already filed, please see the following TurboTax FAQ:https://ttlc.intuit.com/replies/4168567
MY 2020 taxes were rejected. Now I need to fix them.
It's a fairly straightforward procedure. Please see the TurboTax Help article Where do I correct my 2019 AGI in TurboTax Online? for guidance.
The IRS requires your AGI from last year so that it can verify your identity in the electronic filing process.