If you are referring to a 2023 W-2, that can only be entered on a 2023 tax return, you cannot use the TurboTax online editions as they are only for tax year 2024.
If you filed a 2023 tax return last year then you will have to amend the return to add the W-2
See this TurboTax support FAQ for amending a prior year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
If you did not file a 2023 tax return -
To complete and file a 2023 tax return using TurboTax you would need to purchase, download and install on a personal computer one of the 2023 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2023 tax return can only be printed and mailed, it cannot be e-filed using TurboTax.
