Employers have until the end of January to provide your W-2. if your employer is partnered with TurboTax you should be able to import your W-2 into your 2017 tax return. It will NOT be automatically entered in to your 2017 tax return. YOU have to import it or enter it manually yourself.
https://ttlc.intuit.com/questions/1934390-how-do-i-import-my-W-2