I somehow added a credit that I did not mean to and it dropped my owed taxes from $4,350 to $3,350. How do I remove this credit?

I have already looked through all of the credit options as far as I know. It was a random "pop-up" that had me manually enter a number. I thought I was entering the amount I could pay today, but realized at the end of filing that it had removed that amount from my balance. I just need to get that credit removed so that it does not seem as if I was trying to lie about credits.