State tax filing

When starting your son's state returns, start by adding Wisconsin first, and then add Missouri.  By doing this, it will trigger the questions on how much of your son's capital gains are from the state of Wisconsin.  

By selecting yes, you will get a series of screens that look like this:

You can delete your state returns and start them over to get these screens by following these steps:

1. While in your Tax Home,
2. Select State from the left side of your screen,
3. Select Delete next to State of Wisconsin, 
4. Select Delete next to State of Missouri.
5. To add, simply add from the State from the left side of your screen.