If you filed a Joint return for 2017 then there is only one AGI. You enter the same AGI for each of you.
When did you file 2017? If it was after August try using 0 for the AGI. And see,
https://ttlc.intuit.com/community/rejections/help/what-if-i-entered-the-correct-agi-and-i-m-still-ge...
