I'm in a similar situation as I received a letter from IRS notice CP 12 tax year 2020 today saying The last name of one or more individuals claimed as a qualifying dependent does not match our records. One or more individuals claimed as a qualifying dependent exceeds the age limit. Your adjusted gross income exceeds $75,000 ($150,000 if married filing jointly, $112,500 if head of household). The amount was computed incorrectly.” the amount was computed incorrectly (683D)
