South Carolina Department of Revenue provides an online method to submit your monthly ST388/ST389 forms. https://www3.sctax.org/esales/
Following information was provided on their site as of February 2015:
•If you are an Accommodations filer and file via our eSales or EDI systems, you must mail to the following address a paper ST-3T Accommodations Report by County or Municipality for Sales and Use Tax Form. This Form can be found on our website www.sctax.org under Forms and Instructions > Sales
South Carolina Department of Revenue
PO Box 125
Columbia SC 29214
The SCDOR is in the process of making system changes so that in the future Accommodations filers can file the ST-3T electronically. If all the appropriate returns are not submitted, you will be issued assessments for failure to file a return and/or payment until the completed tax returns are received.
When testing the SC online system, the following 25 screens were required to complete the forms: