On that screen, you will be asked, "Do you need to enter any additional W-2 (W2) forms?". Answer "Yes" to that question, and you can enter another W-2 (W2). Repeat the cycle until you have entered all of your W-2 (W2) forms.
Remember to only enter a single W-2 (W2) for each employer. A W-2 (W2) will have a federal copy, a state copy, and a copy for your records. You only enter the same W-2 (W2) once, not multiple times.