If I was single in 2022 and married in 2023 would the AGI for 2022 be the combined amount for verification? IRS keeps rejecting this as it states AGI is incorrect.

You enter the 2022 AGI from your 2022 Form 1040 Line 11 for yourself.  If your spouse filed a 2022 tax return then they enter the 2022 AGI from their return.  If they did not file a 2022 tax return then enter a 0 (zero).