E-filing Rejected

Have now tried 2x to efile a return for my son and both times rejected for same reason "IND-031-04 - The primary taxpayer's AGI or Self-select PIN from last year does not match IRS records."  Number entered was complete match to the tax filing made by mail last year. I prepared his return last year as well using TurboTax Home & Business 2020.  He is not available to sign before the 18th and I cant get his transcript from the IRS.

 

WHAT DO I DO?