You cannot enter a W2 from 2021 into your 2022 tax return. If you filed a 2021 return, you would have to amend your 2021 return to add the W2. If you did not file a 2021 return, you would need to prepare a 2021 tax return. You cannot file a 2021 return with the Online version. To use TurboTax you would need the 2021 desktop software.
https://turbotax.intuit.com/personal-taxes/past-years-products/
