all i have to do is add my agi to a new 2020 how do i do that?
If you used the wrong AGI, your e-file will be rejected. When you get the rejection notice, correct it and re-file.
https://ttlc.intuit.com/community/agi/help/where-do-i-correct-my-agi-in-turbotax-online/00/26311
Enter the AGI amount in the box provided as you go through the steps to FILE your return.