How do I add a North Carolina income tax form?

Your resident state taxes all income but gives a credit for income taxed by another state.  Please carefully follow these directions to prepare the states in a special order. You may need to delete both states and begin again.

1. First, prepare your non-resident NC return. This creates your tax liability for the non-resident state. How do I file a nonresident state return?
2. Then prepare your resident state SC return and it will generate a credit for your income already being taxed in the non-resident state.
3. The credit will be the lower of the state tax liabilities on the same income. You may owe your resident state, if they have a higher tax rate.

It isn't possible for the program to create a credit before it knows the liability. Your returns may be wrong if you do not prepare the states in this order.

....and note that you will have to wait until after 24 Feb to e-file NC...so the weekend might be safer.  Heck, mid-March is safer as most everything will be properly bug-fixed by then.