South Carolina Business State Tax Extension I S Corporations Filing Guide

SC1120-T | Application for Automatic Extension of Time to File Corporate Tax Return  ·  S-Corporations  ·  Business Filing Guide

• South Carolina S Corporations are subject to state business tax filing requirements, administered by the South Carolina Department of Revenue. South Carolina grants an automatic extension tied to an approved IRS extension, making the process simple for businesses that have already filed IRS Form 7004.
• Extension Period & Extended Deadline
• South Carolina automatically grants an extension to file, provided you have obtained an approved federal extension from the IRS by filing IRS Form 7004. With a valid IRS extension, the South Carolina extended deadline becomes September 15, 2026. No separate state extension form is required—the federal extension serves as your South Carolina extension.

Use the South Carolina | Online Tax Extension Payment to pay electronically. For mail-in payments, use SC1120-T | Application for Automatic Extension of Time to File Corporate Tax Return and send to: South Carolina Department of Revenue Corporate Voucher P.O. Box 100153 Columbia, SC 29202

• File IRS Form 7004 with the IRS to secure your federal extension, which South Carolina automatically honors.
• Use the state online payment portal for fast, convenient electronic payment.
• Set a reminder to file your completed South Carolina S-Corporations return by September 15, 2026.

• South Carolina’s business tax extension is straightforward once your federal extension is approved. Pay any balance due on time and file your S-Corporations return by September 15, 2026.
• Quick Reference Table
• State Abbreviation
• SC
• State Name
• South Carolina
• Business Entity Type
• S-Corporations
• Extension Status
• Approved with Federal
• Extended Due Date
• September 15, 2026
• Other Information
• South Carolina grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. Be sure to attach a copy of the federal extension to the return when your South Carolina return is filed. The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date.
• Online Payment
• South Carolina | Online Tax Extension Payment
• Payment Voucher Form
• SC1120-T | Application for Automatic Extension of Time to File Corporate Tax Return
• State Payment Agency
• South Carolina Department of Revenue
• Mailing Address with Payment
• South Carolina Department of Revenue Corporate Voucher P.O. Box 100153 Columbia, SC 29202

Business tax returns are complex—a licensed CPA or Enrolled Agent can maximize deductions, ensure accurate calculations, and handle filing on your behalf. Here's how working with a TaxPro typically goes:

1. 1Get matched with a verified U.S.-based CPA or Enrolled Agent
2. 2Upload your business documents via secure drag-and-drop
3. 3Review and approve your return with upfront, transparent fees
4. 4Your TaxPro files your South Carolina return by September 15, 2026

Quick Reference Table