State tax filing

Thank you for your response.  How do I go about getting the NC tax credit then?  Is that automatically added into my SC return or do I have to go somewhere for it?  When I do my SC return, it asks me for income I earned while I was a resident of SC.  I entered the portion I earned in NC while I lived in SC and it says I owe taxes on that to SC now.  Doesn't that essentially mean that I am being double taxed?