Enter one W-2 and then after it is completed the program will ask you if you have another W-2 to enter.  Answer YES.

After you enter one you can add another.  You have to report all your income on the same return.  Or did you already file the first one?

To add a  W2 just type w2 (small W)  in the search box at the top of your return and click on Jump To the W2

OR  To Add a W2 enter it under

Federal Taxes on the left side

Wages & Income  

Then Wages and Salaries- Click the Start or Update button

Then if you are married you should have 2 buttons...Add w-2 for (taxpayer name) and Add w-2 for (spouse name). Click on the correct button to add a W-2.