If you were a resident for only a part of the year, your income subject to tax will be split. Part taxed according to resident rules and the remainder subject to nonresident rules. The resident rules I explained. You are taxed on all income and given credit for taxes paid to the other state while a resident. So if you were earning SC money while living in NY, these rules would apply.
You earned your income in the state you lived at the time so non-resident rules apply. Basically you will be able to deduct the SC income on your NY personal return. NY wont use the total business income as the point of taxation.
