You enter yours the same way. When you start entering a W2 or 1099 form it will ask who it is for. When you started after you entered his name and ssn did you pick married and filing Joint then enter your name and birthdate etc?
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.