If I have input my W2 info but need to add my wives info, she is self employed and does not have a W2, how do I input her info on the income section?

In your open return, click on the "Income & Expenses" tab.  Click "Edit/Add" next to "Self-employment income and Expenses" (if you don't see that listed at first, click "show more income" to expand the list). The program prompts will guide you through entering the business income and expenses.