the pandemic also had a deleterious effect on the IRS. Like other employers. employees not coming to work, employees quitting, offices closed, having problems replacing employees.
also at fault Congress cutting the IRS budget even though all the recent tax changes require more resources to prevent the treasury from getting ripped off more than usual
and the IRS which has spent a fortune trying to update its computer system without success read here
https://www.atr.org/40-years-of-failure-irs-unable-to-fix-computer-system/
