I would double check that you actually filed 2023 and it wasn’t really on the 2024 forms. Most places can only efile 2024 after Oct 2024. Anything about 2023 should not affect filing 2024 unless you already filed a 2024 return. When you efile 2024 enter 0 for the 2023 AGI since you filed 2023 late or if it rejected.
Sounds like you still need to file 2023 if the efile rejected? Then you will have to print and mail 2023.
