Amend...

I submitted my taxes thinking I had not gotten the third stimulus check (we did get it). Before clicking the button saying that I did not get it, I was still getting money back from the Fed. On the IRS website, it now says I OWE $160. My letter was mailed on 3/22 so I have not gotten it yet. Is it possible to amend my taxes to exclude the stimulus and have them reprocessed?