What if !m not sure on the exact dates I was employed and the employer doesn't either? (I have not received my w2 and it is march 9th.)

I have been into the stroe and talked to the GM and she said it was sent to the wrong address and had to be resent. I updated my Address a week before they were mailed. She says it was ,ailed back to corporate and she has no way of know when ill get it. This was Feb 10th. It is now March 9th. And the gm is conveniently never there when i call.