Yes you are correct, you select Add another W-2.
1.
Open (continue) your return if you don't already have it open
and click the button Take me to my return
2.
Select Federal in the left navigation panel.
3.
Next select Income & Expenses at the top.
4.
Scroll down to Wages and Salaries and select Show
more.
5.
Click Start/Revisit next to Wages and
Salaries
6. Select the button that says Add another W-2 (see screenshot)