That was actually the first thing that I looked for, but for some reason the 1040-X wasn't showing up in the forms used and wouldn't come up in a search.  I had indicated that I wanted to electronically amend the return, which is what I thought triggered the 1040-X to appear.  At any rate, something I did resulted in the 1040-X appearing and I did check the 2020 box.  Thanks.