Amend 1040 due to name change?
My husband adopted my son in 2020. I filed my 2020 taxes with my son's new last name. We received a partial return and a notice that the IRS changed our credits. That led me to realize my error. I changed my son's birth certificate but failed to update his social security card, so now it doesn't match the IRS records. Should I file an amended 1040? Or should I change his name on his social security card and provide that info to the IRS? Not sure the easiest/quickest way to go about this.