The AGI was the key for me. My return for 2020 has still not been processed by the IRS, so they have no idea what my AGI was from last year. You need to put $0 in the AGI for last year and it will accept the return. I actually found this on a CNBC article and it had a link to the IRS page with the same instructions. It would be nice if Turbotax also gave you a clue about this instead of just telling you to keep retrying to file your return.
