New client who is a resident of South Carolina where his home and family are, but all his income is from working in NYS, he commutes back and forth every week. He has an apt in NY for when he is here. His W-2 only shows income form NY which is normal but shouldn't it also show the same income for the resident state  of S.C. His spouse does not work and there isn't any other type of income from S.C. Since there is only the NY address on the W-2 do I claim him a NY resident and don't even file a S.C return, or claim the same income for S.C, then take the credit for taxes paid to another state.