Amending A Return After Receiving A Late 1099-NEC

I filed my return and received my refund checks (fed & state) but now I received a 1099-NEC form for consulting work I did for the company I retired from last year.  I don't have a "business" as such, I was just paid for some extra work.  How do I properly amend my taxes?  When I try in TT it's asking for my business ID and acting like I need to have a business.