Lawsuit settlement

I've already filed my taxes and I just received a lawsuit settlement check for a company I was employed with years ago. Check was created on 12/30/21. I knew nothing about this as it was sent to a relatives house which arrived just yesterday so I'm not sure if they received a prior notice regarding it. I received a W-2 wage and tax statement with the year 2021. Am I going to have to amend my taxes and add this on?