I filed my taxes and my third stimulus payment was supposed to be tax exempt and I made a mistake and lost $1400 of my taxes. How can I get the $1400 back?

I was shown the recovery rebate credit page while I did my taxes but I didnt understand what it was and unfortunately I skipped it and it took $1400 out of my taxes. How can I get my money back from a stimulus that was said to be tax exempt but was taxed from me to begin with? Also I was never given the option to accept or decline the stimulus payment it was directly deposited into my bank account. Please help I need this money.