Do you mean a W-2 from 2020? Then, No. You must file a W-2 from 2020 on a 2020 return. Similarly, you enter 2021 W-2 information on your 2021 tax return.
Please see this helpful TurboTax FAQ on how to file prior-year tax returns: How do I prepare a 2020, 2019, or 2018 tax return?
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