Question: What is the 1099 filing address for South Carolina?   Answer: Sign, date and mail your SC WH-1605 Form (STATE OF SOUTH CAROLINA DEPARTMENT OF REVENUE – WITHHOLDING QUARTERLY TAX RETURN) along with your 1099 forms to: SC Department of Revenue Withholding Columbia SC 29214-0004   For more information refer to http://1099-efile.realtaxtools.com/state/South%20Carolina/