Your W-2 isn't stored in TurboTax. You can import it if your employer is an import partner and you have their EIN and your Box 1 wages amount.
https://ttlc.intuit.com/replies/3389204
If you don't have any of that information to import, you will need to contact your employer or their payroll department to have them reissue your W-2 to you.
https://ttlc.intuit.com/replies/4192470