Important Announcement

Due to critical system updates and the Labor Day holiday, the Louisiana Department of Revenue (LDR) will be closed from 2 p.m. on Friday, Sept. 4, 2026, through Monday, Sept. 7, 2026. In addition to the closure of all LDR offices during this period, all online services including electronic tax filing and payments and the Louisiana Taxpayer Access Point (LaTAP) portal will be unavailable as well. All in-person, telephone and online customer service will resume on Tuesday, Sept. 8.

Declaration of Estimated Corporation Income - 4th Payment

Wednesday, December 15, 2027

The Declaration of Estimated Corporation Income - 4th Quarter is due on the 15th day of the 12th month of taxable year. The taxable year begins January 1st and ends December 31st for calendar filers, fiscal year filers will need to adjust due date accordingly.

Download tax returns and other forms.

File electronically with an approved vendor.

December 15, 2027