After you file


@3Nutcasegls wrote:

Who do I need to deal with 


If the 2020 federal tax return was rejected for the 2019 AGI then enter 0 (zero) for the 2019 AGI and e-file the 2020 tax return again.

No one from TurboTax can fix a rejected tax return for you.  You are not charged for e-filing using the TurboTax online editions.