Can i file a W2 from 2017 with my 2019 taxes

No.  A 2017 W-2 cannot be entered on a 2019 tax return.

You would need to amend the 2017 tax return that was filed to add the 2017 W-2.

See this TurboTax support FAQ for amending a 2017 tax return - https://ttlc.intuit.com/community/amending/help/how-do-i-amend-a-return-in-turbotax/01/27372

  NO!  Each tax year has to be prepared and filed separately using the software and forms for the specific tax year.  You cannot combine them--ever.  The online program is ONLY for your 2019 return and you may only put 2019 income on it.

To file a return for a prior tax year

Only a 2019 return can be prepared online and e-filed.

If you need to prepare a return for 2016, 2017 or 2018 you can purchase and download desktop software to do it, then print, sign,  and mail the return(s)

https://turbotax.intuit.com/personal-taxes/past-years-products/

Remember to prepare your state return as well—if you live in a state that has a state income tax.

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.  Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return.

https://ttlc.intuit.com/questions/1900990-how-do-i-file-a-prior-year-tax-return

Note: Desktop software requires a full PC or Mac—it cannot be installed to a mobile device