If your employer has partnered with TurboTax and made it available for import you can try to import it. Many W-2's are not ready yet. Employers have until January 31 to issue them. If your employer has not issued it yet you have to wait.
https://ttlc.intuit.com/questions/1934390-how-do-i-import-my-W-2
https://ttlc.intuit.com/questions/2588751-why-can-t-i-import-my-w-2
Do you have a list of employers that partner with turbo tax
No we do not have a list. Ask your employer. They have until January 31 to issue your W-2. You may just have to wait for them.
https://www.intuit.com/partners/financial-institutions/professional-services/tax-import/program-overview/partner-list/