I finally got my tax returns from my old job that I have never filed but it says I already did

[xmasbaby0]

You do not get a tax return from an employer.  But you can get a W-2 Wage and Tax Statement that you enter on a tax return Form 1040.    

"It says I already did.."  

What is "it" that says you filed?

[xmasbaby0]

@zubiadiaz96- Did you try to e-file and get a duplicate Social Security number rejection?  Is that "it?'  

Did you use the non-filer site to get a stimulus check?

If you used the IRS non-filer site to get a stimulus check, you will now get a  “duplicate SSN” rejection.  We are seeing people who did not notice or ignored the warning on that site about using it if they would be filing a tax return.

https://ttlc.intuit.com/community/tax-topics/help/stimulus-how-to-file-your-return-after-getting-rej...