You will have to file a Georgia nonresident tax return reporting your income and the Georgia taxes withheld while working in Georgia. On your South Carolina tax return you will get an Other State Credit for the taxes paid in Georgia.
Complete the nonresident return before completing the South Carolina return so the tax credit will flow to the SC return.
In the My Info section of the return you will need to indicate that you made money in another state and then select Georgia from the dropdown.
