Sorry to be snarky, but I clearly said I had already verified that the AGI matched what the IRS had on file, which is all the unfinished paged you linked to says. Honestly I expected TurboTax to have a better guide than one that says: "If you're still having trouble, we suggest that you check with the IRS to make sure that the copy of your return is the same as what they have in their records. To do this, you can order a variable goes here."
If any one hits thread from google like I did, the real answer is that if you can stomach the biometrics collection of ID.me, you need to request an Identity Protection PIN from the IRS (for both you and your spouse if filing jointly) and enter the PIN's on the return under Personal->Other Tax Situations->Other Return Info. While IP PINs can be requested for dependents, I did not need to do so in order for my return to be accepted.
https://www.irs.gov/iden[product key removed]-scams/get-an-identity-protection-pin
