Is Susana your spouse? If you filed a Joint return last year then use the same AGI for each of you.
If she didn't file a return last year enter 0.
You need your 2018 AGI to efile 2019. The AGI is on 2018 1040 line 7.
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/01/25947
