Louisiana State Tax Forms

Louisiana uses several state tax forms depending on a taxpayer’s residency status and type of income.

For individuals, the primary income tax returns are Form IT-540 for full-year residents and Form IT-540B for nonresidents and part-year residents.

Businesses and individuals can access these and all other required forms through the Louisiana Department of Revenue (LDR) website.

Louisiana generally bases its calculations on federal income figures, so taxpayers should complete their federal return before preparing their Louisiana state return.

Key Louisiana Tax Forms

The LDR provides a wide range of forms tailored to different taxpayers and tax situations.

For Individuals

• Form IT-540 – Louisiana Resident Individual Income Tax Return
  The primary personal income tax return for full-year Louisiana residents. This form is used to report income, claim deductions and credits, and calculate state tax owed or refunds.
• Form IT-540B – Louisiana Nonresident and Part-Year Resident Return
  Used by taxpayers who lived in Louisiana for only part of the year or earned Louisiana-source income while residing in another state.
• Form IT-540ES – Estimated Income Tax
  Includes vouchers and instructions for individuals who must make quarterly estimated tax payments, such as self-employed taxpayers or those with significant non-wage income.
• Schedule C – Credit for Taxes Paid to Other States
  Allows residents to claim a credit for income taxes paid to another state, helping prevent double taxation.
• Form L-4 – Employee’s Withholding Exemption Certificate
  Completed by employees and submitted to employers to determine the correct amount of Louisiana income tax to withhold from wages.

For Businesses

• Form L-1 – Employer’s Quarterly Return of Louisiana Withholding Tax
  Used by employers to report and remit Louisiana income tax withheld from employee wages.
• Form R-5629 – Consumer Excise Tax Return
  Used to report and pay excise taxes on certain products, such as internet or mail-order tobacco and alcohol.
• Sales and Use Tax Forms
  Various forms are available for reporting and paying state and local sales and use taxes. Filing can be completed electronically through the Parish E-File portal or the LDR’s Louisiana Taxpayer Access Point (LaTAP) system.

How to Obtain Louisiana Tax Forms

• Download Online
  The fastest and most reliable method is downloading PDF forms directly from the official Louisiana Department of Revenue Tax Forms page.
• Electronic Filing
  The LDR encourages taxpayers to file electronically using LaTAP or approved tax preparation software. E-filing offers faster processing, quicker refunds, built-in error checks, and immediate confirmation that returns and payments were received.
• By Phone
  Paper forms may be requested by calling the LDR at (888) 829-3071, option 6, or (225) 219-2113.
• In Person
  Forms can also be picked up at the LDR headquarters in Baton Rouge or at a regional office.

Why Choose Electronic Filing?

Electronic filing is the most efficient way to file Louisiana tax returns. It reduces errors, shortens processing times, speeds up refunds, and allows taxpayers to securely submit payments and track account activity online.

For most individuals and businesses, e-filing through LaTAP or commercial tax software is the preferred and recommended option.

If you’d like, I can tailor this for a taxpayer guide, website content, or client-facing handout, or format it to match the style of other state tax summaries you’re preparing.