State tax filing

Depending though how much gambling income there is, you may not owe anything if all you have is gambling income. If your gambling income did not reach the standard deduction of your filing status, then there is no tax consequence to you. 

Here are the standard deduction amounts for North Carolina.  See if the amount of your gambling income reached the threshold of your filing status by looking at the screenshot below.

Also, Turbo Tax sometimes will stick so if you try to play around with different scenarios, it may not work the way you expect. When this happens and if you really need to change a number, it may be necessary to delete your state return and start over.