It's best to file all W-2 and 1099's together so that the most accurate return can be filed. Employers have until January 31st to mail out W-2s. If you haven't received your W-2 by February 14th, you can file your return using your paystub and Form 4852 - substitute W-2 form.
https://ttlc.intuit.com/replies/3301808
This link shows you how to file form 4852 using TurboTax:
https://ttlc.intuit.com/replies/5451995