Then Did you type it in and it rejected again?
When did you file 2019? If it was late in the year or you mailed it, try putting in 0 (zero) for the AGI. And see, https://ttlc.intuit.com/community/rejections/help/what-if-i-entered-the-correct-agi-and-i-m-still-ge...
How to correct the AGI
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
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.
For AGI Reject code 031
I typed in the correct AGI for 2019 and I still got it rejected. I have never had to mail my return but may need to this year. 70 pages are a lot to file. And yes I know they need mailed to different locations. I just didn't want to mail as it will be 50$ or so to mail. May try the suggestion of leaving it blank. What is really strange is the correct AGI for last year was already in the box. This is really frustrating. May be last year with Turbo Tax.