My S. Carolina Inc. tax is automatically extended with my Fed extension. I paid the federal tax, how can I pay the SC tax through Turbo or do I need to pay it at SC site?

If you owe, you can pay online via MyDORWAY by April 18 to avoid penalties and interest. To avoid a late-payment penalty, 90% of any tax due must be paid by the original return due date of April 18.