If you do not have a copy of your W-2 Form, please review the instructions on requesting a copy in the TurboTax FAQ: How can I get a copy of my W-2? https://ttlc.intuit.com/replies/4192470
Once you have a copy of your W-2 Form, you may find directions on importing it to your TurboTax account in the FAQ: How do I import or enter my W-2? https://ttlc.intuit.com/replies/4192470