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Connect with a U.S.-based CPA or Enrolled Agent to prepare and file your Indiana business return. Upfront pricing, secure document upload, no surprises.
Connect with a TaxPro →Indiana LLCs and partnerships file composite and withholding returns with the Indiana Department of Revenue. Indiana automatically extends your filing deadline when you hold an approved federal IRS Form 7004–no separate state extension application is needed to receive the September 15, 2026 extended due date.
Obtain approval for IRS Form 7004 before March 16, 2026 and Indiana automatically extends your LLC or partnership return to September 15, 2026. Pay any Indiana tax owed using Form E-6 or electronically through INtax (Indiana’s online tax portal) by March 16. Mail payments to: Indiana Department of Revenue, Corporate Tax Division, P.O. Box 7228, Indianapolis, IN 46207-7228. When filing the return, attach the federal extension and check the extension box on the front page.
LLC / Partnership returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Indiana return is filed accurately and on time.
Indiana requires online payment for tax amounts of $750 or more. Submit electronically via the Indiana Online Tax Extension Payment portal. For amounts under $750, complete Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your payment.
Submit electronically through the Indiana Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 10% penalty of amount of tax due |
| Failure to Pay | 10% penalty of amount held in trust |
| State Abbreviation | IN |
| Entity Type | LLC / Partnership |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | March 16, 2026 |
| Extended Filing Deadline | September 15, 2026 |
| Payment Due | March 16, 2026 (100% of tax owed) |
| Payment Form | Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns |
| Online Payment | Indiana Online Tax Extension Payment |
| State Agency | Indiana Department of Revenue |
| Failure to File Penalty | 10% penalty of amount of tax due |
| Failure to Pay Penalty | 10% penalty of amount held in trust |
Indiana S corporations that elect to pay composite tax on behalf of nonresident shareholders file with the Indiana Department of Revenue. Holding an approved federal IRS Form 7004 extends your Indiana S corporation return to September 15, 2026 automatically–Indiana requires no additional state extension form.
An approved IRS Form 7004 automatically extends your Indiana S corporation deadline to September 15, 2026. Submit any Indiana tax owed by March 16, 2026 using Form E-6 or through Indiana’s INtax portal. Mail payments to Indiana Department of Revenue, Corporate Tax Division, P.O. Box 7228, Indianapolis, IN 46207-7228. Attach the federal extension approval to the Indiana return and check the extension box on the front page when you file.
S Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Indiana return is filed accurately and on time.
Indiana requires online payment for tax amounts of $750 or more. Submit electronically via the Indiana Online Tax Extension Payment portal. For amounts under $750, complete Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your payment.
Submit electronically through the Indiana Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 10% penalty of amount of tax due |
| Failure to Pay | 10% penalty of amount held in trust |
| State Abbreviation | IN |
| Entity Type | S Corporation |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | March 16, 2026 |
| Extended Filing Deadline | September 15, 2026 |
| Payment Due | March 16, 2026 (100% of tax owed) |
| Payment Form | Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns |
| Online Payment | Indiana Online Tax Extension Payment |
| State Agency | Indiana Department of Revenue |
| Failure to File Penalty | 10% penalty of amount of tax due |
| Failure to Pay Penalty | 10% penalty of amount held in trust |
Indiana C corporations pay the state’s corporate income tax to the Indiana Department of Revenue. Indiana grants C corporations a 7-month filing extension when an approved federal IRS Form 7004 is in place–extending the deadline from May 15 all the way to November 15, 2026 without any separate state form required.
File IRS Form 7004 before May 15, 2026 to activate Indiana’s automatic 7-month C corporation extension–no state extension form is required. Pay any Indiana corporate tax owed by May 15 using Form E-6 or electronically through INtax. Mail payments to: Indiana Department of Revenue, Corporate Tax Division, P.O. Box 7228, Indianapolis, IN 46207-7228. When you file by November 15, attach the federal extension approval and mark the extension box on the front page of the Indiana return.
C Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Indiana return is filed accurately and on time.
Indiana requires online payment for tax amounts of $750 or more. Submit electronically via the Indiana Online Tax Extension Payment portal. For amounts under $750, complete Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your payment.
Submit electronically through the Indiana Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 10% penalty of amount of tax due |
| Failure to Pay | 10% penalty of amount held in trust |
| State Abbreviation | IN |
| Entity Type | C Corporation |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | May 15, 2026 |
| Extended Filing Deadline | November 15, 2026 |
| Payment Due | May 15, 2026 (100% of tax owed) |
| Payment Form | Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns |
| Online Payment | Indiana Online Tax Extension Payment |
| State Agency | Indiana Department of Revenue |
| Failure to File Penalty | 10% penalty of amount of tax due |
| Failure to Pay Penalty | 10% penalty of amount held in trust |
Indiana estates and trusts with fiduciary income tax obligations file with the Indiana Department of Revenue. An approved federal Form 8868 extension automatically extends the Indiana fiduciary return from April 15 to October 15, 2026–no separate Indiana form is required.
File IRS Form 8868 with the IRS before April 15, 2026 to extend the Indiana fiduciary return to October 15, 2026 automatically. Remit any Indiana fiduciary tax using Form IT-41ES | Fiduciary Payment Voucher or through INtax by April 15. Mail payments to: Indiana Department of Revenue, Corporate Tax Division, P.O. Box 7228, Indianapolis, IN 46207-7228. When filing, attach the federal extension and confirm the extension box is checked on the front page.
Fiduciary / Estate / Trust returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Indiana return is filed accurately and on time.
Indiana requires online payment for tax amounts of $750 or more. Submit electronically via the Indiana Online Tax Extension Payment portal. For amounts under $750, complete Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your payment.
Submit electronically through the Indiana Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 10% penalty of amount of tax due |
| Failure to Pay | 10% penalty of amount held in trust |
| State Abbreviation | IN |
| Entity Type | Fiduciary / Estate / Trust |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Payment Due | April 15, 2026 (100% of tax owed) |
| Payment Form | Form E-6 | Request for Indiana Corporate Estimated Quarterly Income Tax Returns |
| Online Payment | Indiana Online Tax Extension Payment |
| State Agency | Indiana Department of Revenue |
| Failure to File Penalty | 10% penalty of amount of tax due |
| Failure to Pay Penalty | 10% penalty of amount held in trust |
Work with a U.S.-based CPA or Enrolled Agent who knows Indiana business taxes – secure upload, upfront pricing, and on-time filing.
Connect with a TaxPro →