Louisiana Business Tax Extension LLC / Partnership – S Corporation – C Corporation – Fiduciary
Connect with a U.S.-based CPA or Enrolled Agent to prepare and file your Louisiana business return. Upfront pricing, secure document upload, no surprises.
Connect with a TaxPro →Louisiana Business Tax Extension – LLC / Partnership
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher • LLC / PartnershipLouisiana LLC & Partnership Tax Extension
Louisiana LLCs and partnerships with Louisiana-source income file their returns through the Louisiana Department of Revenue. Louisiana honors the federal automatic 6-month extension granted by IRS Form 7004–no separate state extension form is required. Filing your federal extension moves the Louisiana deadline from May 15, 2026 to November 15, 2026.
How the Extension Works
Submit IRS Form 7004 before May 15, 2026. Louisiana automatically extends your LLC or partnership return to November 15, 2026 when the federal extension is in place. Pay any Louisiana tax owed using the CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher or through LaTAP. Mail payments to: Louisiana Department of Revenue, P.O. Box 3550, Baton Rouge, LA 70821-3550.
Best Practices
- File IRS Form 7004 before May 15, 2026 to activate the automatic Louisiana extension to November 15, 2026.
- Remit any Louisiana LLC or partnership tax using the CIFT-620Ext-V voucher or through LaTAP by May 15, 2026.
- Confirm franchise tax obligations for your Louisiana LLC before the May 15, 2026 due date.
- File the completed Louisiana LLC or partnership return by November 15, 2026.
Working with a Tax Professional
LLC / Partnership returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Louisiana return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Louisiana return by November 15, 2026
How to Pay
Louisiana requires online payment for tax amounts of $750 or more. Submit electronically via the Louisiana Online Tax Extension Payment portal. For amounts under $750, complete CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your payment.
Louisiana Online Payment Portal
Submit electronically through the Louisiana Online Tax Extension Payment system. Required for all payments $750 and above.
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher by Check
Download CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your check or money order. Include your EIN and tax year on the check.
P.O. Box 3550
Baton Rouge, LA 70821-3550
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay | 0.5% of unpaid tax per month, up to 25%. |
LLC / Partnership Quick Reference
| State Abbreviation | LA |
| Entity Type | LLC / Partnership |
| 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 | CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher |
| Online Payment | Louisiana Online Tax Extension Payment |
| State Agency | Louisiana Department of Revenue |
| Failure to File Penalty | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay Penalty | 0.5% of unpaid tax per month, up to 25%. |
Louisiana Business Tax Extension – S Corporation
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher • S CorporationLouisiana S Corporation Tax Extension
Louisiana S corporations file Louisiana corporate income and franchise tax returns with the Louisiana Department of Revenue. Louisiana follows the federal 7004 extension–an approved IRS Form 7004 automatically extends the Louisiana S corporation deadline from May 15, 2026 to November 15, 2026 without a separate state application.
How the Extension Works
Obtain IRS Form 7004 approval before May 15, 2026. Louisiana honors the federal extension and moves your S corporation filing deadline to November 15, 2026. Submit any Louisiana S corporation tax using the CIFT-620Ext-V voucher or pay online through LaTAP. Mail payments to: Louisiana Department of Revenue, P.O. Box 3550, Baton Rouge, LA 70821-3550.
Best Practices
- File IRS Form 7004 before May 15, 2026 to trigger the automatic Louisiana extension to November 15, 2026.
- Pay Louisiana S corporation income tax and franchise tax using the CIFT-620Ext-V or through LaTAP by May 15, 2026.
- Verify Louisiana franchise tax obligations in addition to income tax before the May 15, 2026 due date.
- File the completed Louisiana S corporation return by November 15, 2026.
Working with a Tax Professional
S Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Louisiana return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Louisiana return by November 15, 2026
How to Pay
Louisiana requires online payment for tax amounts of $750 or more. Submit electronically via the Louisiana Online Tax Extension Payment portal. For amounts under $750, complete CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your payment.
Louisiana Online Payment Portal
Submit electronically through the Louisiana Online Tax Extension Payment system. Required for all payments $750 and above.
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher by Check
Download CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your check or money order. Include your EIN and tax year on the check.
P.O. Box 3550
Baton Rouge, LA 70821-3550
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay | 0.5% of unpaid tax per month, up to 25%. |
S Corporation Quick Reference
| State Abbreviation | LA |
| Entity Type | S 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 | CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher |
| Online Payment | Louisiana Online Tax Extension Payment |
| State Agency | Louisiana Department of Revenue |
| Failure to File Penalty | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay Penalty | 0.5% of unpaid tax per month, up to 25%. |
Louisiana Business Tax Extension – C Corporation
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher • C CorporationLouisiana C Corporation Tax Extension
Louisiana C corporations pay corporate income tax and the Louisiana franchise tax to the Louisiana Department of Revenue. An approved IRS Form 7004 grants an automatic 7-month Louisiana extension, shifting the C corporation deadline from May 15, 2026 to November 15, 2026–no separate Louisiana extension form is required.
How the Extension Works
File IRS Form 7004 before May 15, 2026 to receive the automatic Louisiana extension to November 15, 2026. Pay Louisiana corporate income tax and franchise tax using the CIFT-620Ext-V voucher or through LaTAP by May 15, 2026. Mail checks to: Louisiana Department of Revenue, P.O. Box 3550, Baton Rouge, LA 70821-3550.
Best Practices
- File IRS Form 7004 before May 15, 2026 to automatically extend the Louisiana C corporation deadline to November 15, 2026.
- Pay Louisiana corporate income tax and franchise tax using CIFT-620Ext-V or through LaTAP by May 15, 2026.
- Calculate franchise tax based on capital stock and surplus separately from income tax before May 15, 2026.
- File the completed Louisiana C corporation return by November 15, 2026.
Working with a Tax Professional
C Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Louisiana return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Louisiana return by November 15, 2026
How to Pay
Louisiana requires online payment for tax amounts of $750 or more. Submit electronically via the Louisiana Online Tax Extension Payment portal. For amounts under $750, complete CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your payment.
Louisiana Online Payment Portal
Submit electronically through the Louisiana Online Tax Extension Payment system. Required for all payments $750 and above.
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher by Check
Download CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your check or money order. Include your EIN and tax year on the check.
P.O. Box 3550
Baton Rouge, LA 70821-3550
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay | 0.5% of unpaid tax per month, up to 25%. |
C Corporation Quick Reference
| State Abbreviation | LA |
| 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 | CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher |
| Online Payment | Louisiana Online Tax Extension Payment |
| State Agency | Louisiana Department of Revenue |
| Failure to File Penalty | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay Penalty | 0.5% of unpaid tax per month, up to 25%. |
Louisiana Business Tax Extension – Fiduciary
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher • FiduciaryLouisiana Fiduciary Tax Extension
Louisiana fiduciary returns (estates and trusts with Louisiana-source income) are filed with the Louisiana Department of Revenue. Louisiana follows the federal extension for fiduciary returns–an approved IRS Form 7004 or Form 8736 extends the Louisiana deadline from May 15, 2026 to November 15, 2026 without a separate state form.
How the Extension Works
Obtain federal extension approval before May 15, 2026. Louisiana honors the federal extension and moves the fiduciary filing deadline to November 15, 2026. Pay any Louisiana fiduciary income tax owed using the CIFT-620Ext-V voucher or through LaTAP. Mail payments to: Louisiana Department of Revenue, P.O. Box 3550, Baton Rouge, LA 70821-3550.
Best Practices
- Obtain federal extension approval before May 15, 2026 to trigger the automatic Louisiana fiduciary extension to November 15, 2026.
- Pay Louisiana fiduciary income tax by May 15, 2026 using the CIFT-620Ext-V voucher or through LaTAP.
- Review distributable net income (DNI) to confirm Louisiana fiduciary tax liability before the May 15, 2026 payment deadline.
- File the completed Louisiana fiduciary return by November 15, 2026.
Working with a Tax Professional
Fiduciary returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Louisiana return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Louisiana return by November 15, 2026
How to Pay
Louisiana requires online payment for tax amounts of $750 or more. Submit electronically via the Louisiana Online Tax Extension Payment portal. For amounts under $750, complete CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your payment.
Louisiana Online Payment Portal
Submit electronically through the Louisiana Online Tax Extension Payment system. Required for all payments $750 and above.
CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher by Check
Download CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher and mail with your check or money order. Include your EIN and tax year on the check.
P.O. Box 3550
Baton Rouge, LA 70821-3550
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay | 0.5% of unpaid tax per month, up to 25%. |
Fiduciary Quick Reference
| State Abbreviation | LA |
| Entity Type | Fiduciary |
| 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 | CIFT-620Ext-V | Corporation Income and Franchise Tax Extension Payment Voucher |
| Online Payment | Louisiana Online Tax Extension Payment |
| State Agency | Louisiana Department of Revenue |
| Failure to File Penalty | 5% of unpaid tax per 30-day period, up to 25%. |
| Failure to Pay Penalty | 0.5% of unpaid tax per month, up to 25%. |
Extended? Your Louisiana Business Return Deadline Is Coming Up.
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