Earlier this year, I submitted my 2019 tax return, leaving "Someone can claim you as a dependent" unchecked, in order to claim the 2020 stimulus check.
It turns out that my parent normally claims me as a dependent on their tax return. Now, because of me receiving a $1200 stimulus check, they will be overpaying on their taxes by more than $3000 because they can't claim me as a dependent!
With me as a dependent, the standard deduction they could take this year is $18300 (Head of Household), but otherwise, the standard deduction drops to only $12000 (Single).
Is there any way for me to resubmit my 2019 tax return with "Someone can claim you as a dependent" checked and send back the 2020 stimulus check so that my parent can claim me as a dependent?
About my dependent status: Apparently, since I live with my parent the whole year (and thus, the parent pays for my housing), they can claim me as a dependent on their tax returns, which allows them to file as Head of Household. Being over 21, I figured I cannot be claimed as a dependent, as I'm now an adult. Me and my parent file our taxes separately and never actually discussed this.