Solved
I have one from this year and 2 from last year. How do I register both from last year?
You would need to 2020 Desktop version to file your 2 w2's from last year. You cannot enter them in your 2021 tax return.
You can purchase the 2020 Desktop software from TurboTax to file your 2020 W2's.
https://turbotax.intuit.com/personal-taxes/past-years-products/
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