It the AGI amount is correct then listed below are some possible reason(s) it may have an error-
If you:
If you’re still having trouble, we suggest that you check with the IRS to make sure that the copy of your return is the same as what they have in their records. To do this, you can order a tax return transcript.
If you’ve tried everything and nothing works, you can still file a paper return by printing out copies of your federal and state returns and mailing them. We’ll include File by Mail Instructions on where to send your returns and what forms, if any, you need to include.