If you filed the 2021 tax return as Married Filing Jointly the 2021 AGI is the same for the both of you. When TurboTax asks for the 2021 AGI in the File section of the program you should enter the 2021 AGI found on the Form 1040 Line 11 for tax year 2021.
If the IRS rejects the 2022 tax return for the 2021 AGI then there is a good possibility that the IRS does not have your 2021 AGI in their database.
In this case enter a 0 (zero) for the 2021 AGI and e-file the 2022 tax return again.
