You will have to file an amended tax return for 2017 to add the 2017 W-2. An amended tax return can only be printed and mailed by you to the IRS. The IRS will take 3 to 4 months to process the amended tax return.
See this TurboTax support FAQ for amending a 2017 tax return using the online editions - https://ttlc.intuit.com/questions/4252204
