ENTER 0 FOR AGI. The IRS took a long time last year to process 2020 returns so the AGI didn't get entered in time. Especially if you mailed it. Thats works for most people. See...
What if I entered the correct AGI and I'm still getting an e-file reject?
How to correct the AGI in the Online version
https://ttlc.intuit.com/community/agi/help/where-do-i-correct-my-agi-in-turbotax-online/00/26311
If you can’t get it to efile you will have to print and mail it.
How to mail a return from the Online version
How do I print and mail my return in TurboTax Online?
Be sure to attach copies of your W2s and any 1099s that have withholding on them. You have to mail federal and state in separate envelopes because they go to different places. Get a tracking number from the post office when you mail them for proof of filing.
How to fix rejects IND-031 & 032
How do I fix e-file reject IND-031-04 or IND-032-04?
