Complete the South Carolina W-4 so your employer can withhold the correct South Carolina Income Taxes from your paycheck per pay period. 

South Carolina Form W-4, Tax Withholding

If you have too much tax withheld, you will receive a refund when you file your South Carolina Individual Income Tax return. If you have too little tax withheld, you will owe tax when you file your tax return, and you might owe a penalty.

Manage, Calculatoe or Complete your Federal or IRS W-4 Form

Determine the number of withholding allowances you should claim for withholding for the tax year and any additional amount of tax to be withheld. For regular wages, withholding must be based on allowances you claimed and may not be a flat amount or percentage of wages.
Create a new SC W-4 each year and when your personal or financial situation has changed.

This keeps your withholding accurate and helps you avoid surprises when you file your South Carolina Individual Income Tax return.