When must I file Form L-1?


Each Form L-1 covers one quarterly period and must be filed by the last day of the month following the close of the calendar quarter except for semi-monthly payers. Semi-monthly payers must file Form L-1 by the fifteen of the month following the close of the quarter. A quarterly return must be filed even if no taxes are withheld during the quarter. If wages paid to employees were not sufficient to require withholding, an L-1 return should be submitted with zero dollar amounts. The due dates for taxpayers with a Quarterly or Monthly Payment Frequency are:
  • 1st Quarter Due: April 30th
  • 2nd Quarter Due: July 31st
  • 3rd Quarter Due: October 31st
  • 4th Quarter Due: January 31st
The due dates for taxpayers with a Semi- Monthly Payment Frequency are:
  • 1st Quarter Due: April 15th
  • 2nd Quarter Due: July 15th
  • 3rd Quarter Due: October 15th

Filing Dates


News & Announcements

August 12, 2025

Guilty plea resolves fraud investigation related to Hurricane Ida recovery

A guilty plea in a Baton Rouge criminal court closes the investigation into a fraud case related to the recovery process following Hurricane Ida in 2021.

July 31, 2025

New penalties for Kratom in effect Aug. 1

Starting Aug. 1, 2025, severe new penalties are in effect for the possession of the herbal supplement known as Kratom. Kratom is sold often as an energy booster, pain reliever and mood lifter. Its potential harmful side effects include liver toxicity, seizures and death.

July 28, 2025

Millions in state tax refunds moving to Unclaimed Property if taxpayers don’t claim them

BATON ROUGE – Louisiana taxpayers have until Sept. 6, 2025, to claim millions of dollars in state tax refunds before they become unclaimed property.


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