Retirement tax questions

Roger, thanks for your response. I'm still a bit confused, I guess. I did submit a Form 8606 on my prior year return, claiming I'd contributed to a traditional IRA. However, I should not have. I do not have a traditional IRA, and simply misunderstood retirement accounts when I did so (i.e. that mine was a 401K, with contributions reported in my W-2). That said, do I need to amend last years returns to EXCLUDE the form 8606 and report NO contributions to an IRA in 2020, essentially.