I live in SC and work in NC - do i have to pay full income taxes in both states?
You don't have to pay fell taxes in both states. This is because taxes are not paid by one individual twice. You will only pay taxes in a state that you live in or your resident state.
Usually you owe income taxes only in the state that is your state of residence. There would have to be an unusual case for this to be otherwise.
No just state tax in the one you live in fed tax is just that no mater where you live or work