If you have not filed yet, see the following.
Where do I add or enter a second W-2?
https://ttlc.intuit.com/replies/4712124-------------------------------
If you have already filed your return and it has been accepted, you would have to amend your return to add the additional W2. Amended returns must be mailed. The IRS suggests you wait until your original return is fully processed before you amend.
How do I Amend (Change or Correct) a 2016 Return with TurboTax?
https://ttlc.intuit.com/replies/5114064
