I entered our joint AGI from line 37 for last years AGI. It's rejected, needing my wife's AGI. She had a schedule C. If her AGI is not included in 37, where do I look?

If you filed a Joint return last year, there will be only one AGI to report.

Thank you! I think I just missed the step when I had to update the AGI for both of us. I'd inadvertently provided the 2015 AGI to e-file, so it was rejected. Then when I updated with the 2016 AGI, I apparently didn't update hers as well. I tried it with just changing hers to what I indicated mine was and it was accepted by the IRS. User error was all.