You can enter any 5 digit code that you select.
For the 2023 AGI, if you filed your 2023 tax return as Married Filing Jointly then the 2023 AGI is the same for the both of you from the 2023 Form 1040 Line 11.
If you did not file your 2023 tax return as married and your spouse did not file a 2023 tax return then enter a 0 (zero) for the 2023 AGI.
