@jjoshlin
That second part was for other folks who might read this Q&A
1) AGI must be the line 7 of your 2018 form 1040...for the FIRST time you e-filed your 2018 taxes and had it accepted. Not form any later changes you might have made to amend the taxes.
2) If you filed your 2018 taxes late in 2019 on paper, try a zero. Late-Paper-filed tax returns might not be entered in the e-file system for noting the previous year's filing AGI.
3) IF it still fails, you may end up having to mail-paper file this year.
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Here's an additional help FAQ:
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/01/25947
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
