I had my 2018 taxes amended and to e-file this year they are asking for my AIG from last year what do I do

Use the AGI from the first original return.

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

Or see the screen shot by critter on this one,
https://ttlc.intuit.com/community/taxes/discussion/re-i-m-order-to-complete-my-taxes-it-is-asking-me-for-a-form-from-2018-that-i-don-t-have-and-i-don-t/01/995184