How can I get my W-2 for 2023 on TurboTax?

Your Employer should provide you your W2 by 31st Jan. If you haven't been mailed a copy, they may be providing it electronically. Contact any employers you've had in 2022 and ask for your W2(s).

You mean your 2022 W-2 since tax year 2022 is the year being reported in 2023.

See this TurboTax support FAQ for importing or entering a W-2 - https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/import-enter-w-2/L55HzdeDr_US_en_US?uid=lem193lb