Connect with a U.S.-based CPA or Enrolled Agent to prepare and file your Kansas business return. Upfront pricing, secure document upload, no surprises.
Connect with a TaxPro →Kansas LLCs and partnerships file Kansas income tax returns with the Kansas Department of Revenue. Kansas ties its business extension to the federal process–an approved IRS Form 7004 automatically extends the Kansas filing deadline by 6 months to September 15, 2026, with no Kansas extension form required.
File IRS Form 7004 before March 16, 2026 to receive Kansas’s automatic 6-month extension–no state extension form is needed. Submit any Kansas tax owed using Form K-120V | Kansas Corporate Income Tax Voucher by March 16, or pay online through the Kansas Department of Revenue online portal. Mail payments to: Kansas Department of Revenue, Corporate Estimated Tax, P.O. Box 3506, Topeka, KS 66625-3506. File the completed return by September 15, 2026.
LLC / Partnership returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Kansas return is filed accurately and on time.
Kansas requires online payment for tax amounts of $750 or more. Submit electronically via the Kansas Online Tax Extension Payment portal. For amounts under $750, complete Form K-120V | Kansas Corporate Income Tax Voucher and mail with your payment.
Submit electronically through the Kansas Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form K-120V | Kansas Corporate Income Tax Voucher and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| State Abbreviation | KS |
| 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 K-120V | Kansas Corporate Income Tax Voucher |
| Online Payment | Kansas Online Tax Extension Payment |
| State Agency | Kansas Department of Revenue |
| Failure to File Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
Kansas S corporations are subject to Kansas corporate income tax filing requirements administered by the Kansas Department of Revenue. An approved IRS Form 7004 gives Kansas S corporations an automatic 6-month extension from March 16 to September 15, 2026–no separate Kansas application is required.
Obtain an approved IRS Form 7004 from the IRS before March 16, 2026 and Kansas will automatically extend your S corporation filing deadline to September 15, 2026. No Kansas-specific extension form or confirmation is needed. Pay any Kansas S corporation tax with Form K-120V | Kansas Corporate Income Tax Voucher or online at the Kansas Department of Revenue customer service portal. Mail checks to Kansas Department of Revenue, Corporate Estimated Tax, P.O. Box 3506, Topeka, KS 66625-3506.
S Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Kansas return is filed accurately and on time.
Kansas requires online payment for tax amounts of $750 or more. Submit electronically via the Kansas Online Tax Extension Payment portal. For amounts under $750, complete Form K-120V | Kansas Corporate Income Tax Voucher and mail with your payment.
Submit electronically through the Kansas Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form K-120V | Kansas Corporate Income Tax Voucher and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| State Abbreviation | KS |
| 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 K-120V | Kansas Corporate Income Tax Voucher |
| Online Payment | Kansas Online Tax Extension Payment |
| State Agency | Kansas Department of Revenue |
| Failure to File Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
Kentucky C corporations pay corporate income tax and the Limited Liability Entity Tax (LLET) to the Kentucky Department of Revenue. Kentucky automatically extends C corporation returns by 6 months when an approved federal IRS Form 7004 is in place–shifting the deadline from April 15 to October 15, 2026 without requiring a separate state extension form.
File IRS Form 7004 before April 15, 2026 to activate Kentucky’s automatic 6-month extension for C corporations–no additional Kentucky form is needed. Pay any Kentucky C corporation tax using Form 720EXT or through Kentucky’s online business tax portal by April 15. Mail checks to: Kentucky Department of Revenue, Frankfort, KY 40620-0021. Complete and file your Kentucky C corporation return by October 15, 2026.
C Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Kansas return is filed accurately and on time.
Kansas requires online payment for tax amounts of $750 or more. Submit electronically via the Kansas Online Tax Extension Payment portal. For amounts under $750, complete Form K-120V | Kansas Corporate Income Tax Voucher and mail with your payment.
Submit electronically through the Kansas Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form K-120V | Kansas Corporate Income Tax Voucher and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| State Abbreviation | KS |
| Entity Type | C Corporation |
| 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 K-120V | Kansas Corporate Income Tax Voucher |
| Online Payment | Kansas Online Tax Extension Payment |
| State Agency | Kansas Department of Revenue |
| Failure to File Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
Kansas estates and trusts with Kansas-source income file fiduciary returns with the Kansas Department of Revenue. Kansas automatically extends fiduciary filers by 6 months when an approved federal IRS Form 8868 is in place–pushing the deadline from April 15 to October 15, 2026 without any Kansas state form required.
File IRS Form 8868 with the IRS before April 15, 2026 to extend the Kansas fiduciary return to October 15, 2026–Kansas follows automatically with no state extension application needed. Remit any Kansas fiduciary tax using Form K-41V | Kansas Fiduciary Payment Voucher by April 15, or pay online through the Kansas DOR portal. Mail fiduciary payments to: Kansas Department of Revenue, Kansas Fiduciary Income Tax, P.O. Box 750260, Topeka, KS 66699-0260.
Fiduciary / Estate / Trust returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Kansas return is filed accurately and on time.
Kansas requires online payment for tax amounts of $750 or more. Submit electronically via the Kansas Online Tax Extension Payment portal. For amounts under $750, complete Form K-120V | Kansas Corporate Income Tax Voucher and mail with your payment.
Submit electronically through the Kansas Online Tax Extension Payment system. Required for all payments $750 and above.
Download Form K-120V | Kansas Corporate Income Tax Voucher and mail with your check or money order. Include your EIN and tax year on the check.
| Penalty Type | Amount |
|---|---|
| Failure to File | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| State Abbreviation | KS |
| 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 K-120V | Kansas Corporate Income Tax Voucher |
| Online Payment | Kansas Online Tax Extension Payment |
| State Agency | Kansas Department of Revenue |
| Failure to File Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
| Failure to Pay Penalty | 1% of the unpaid balance per month or fraction thereof, not to exceed 24% |
Work with a U.S.-based CPA or Enrolled Agent who knows Kansas business taxes – secure upload, upfront pricing, and on-time filing.
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