Electronic Transmission Error for 2018 AGI for 2019 filing.

I'm receiving a transmission error for my spouses AGI for 2018 being incorrect. I filed 2018 tax returns using TurboTax and it transferred the amount to 2019. I've double checked it several times. The only thing I can think of is that my husband passed away in October 2019. I thought we still put in the full 2018 AGI into the field but that doesn't seem to be working and is rejecting upon submission. Please advise how to correct.