E-file rejected

Hi,

I submitted my daughter's Federal and state late in December 2020 due to an amendment required on my tax filing. IRS took more than six months to clear me. Then I was asked to submit my daughters only by the paper as e-filing is closed. As of March 6, the IRS page did not acknowledge they received it, and I have UPS track delivered to them on December 20, 2020. I understand IRS is busy, and I tried to submit this year's Taxes for her, and it was rejected because I IND-031-04: The primary taxpayers. AGI or self-select PIN does not match IRS records. I don't know what to do now. Please help advise.

Thanks

LV