How to register and file Louisiana sales tax with LaTAP

A new restaurant owner in Louisiana has a long list of agencies to visit before the doors open, and sales tax is the one that can cost the most if it is done wrong. The Louisiana Department of Revenue runs its business accounts through an online system called LaTAP. This guide, checked in November 2026, walks through registering, the warning the department itself gives about when not to register, how the account is activated and how returns are due. It is general information, not legal advice, and the department's pages are the authority.

Who needs a Louisiana sales tax account?

A seller or lessor that qualifies as a dealer under Louisiana Revised Statutes 47:301(4) must apply for a sales tax certificate. The department lists the qualifying activities as selling or leasing tangible personal property or digital products in the state, keeping a business location in the state or holding inventory there. A restaurant that sells prepared food in Louisiana is selling taxable goods, so it needs an account before it makes taxable sales. The department's separate guidance on taxability explains why restaurant meals are taxable.

When should you not register?

The department's registration page gives three plain warnings. Do not register for a Louisiana sales tax account unless your business is required to collect Louisiana sales tax. Do not register for Louisiana withholding tax until you actually have employees. And do not collect Louisiana sales tax unless you are registered and legally required to do so. The reason is practical: an open account creates a filing duty, and a return is due for every period whether or not you sold anything. If you register months before you open, you will file empty returns while you build out the kitchen. Time your registration to the first taxable sale, and ask your accountant when that date is.

How do you register through LaTAP?

New businesses register through the LaTAP website, using the Register My Business link in the registration section. For people who already have a state tax account number, the department's help page describes the account setup. You choose Register, follow the prompts and enter the information it asks for. Once the department verifies it, you create a username and password. The account is then activated with an authorization code that the department sends by email or by mail. Keep the activation message, because you will need the code and your account number whenever someone else, such as a bookkeeper, needs access.

How often do returns have to be filed?

The department states that returns and payments are due by the 20th of the month after the reporting period closes, and that reporting periods are calendar months or quarters. Your filing frequency is set in the account, so confirm it in LaTAP rather than assuming. A new restaurant should file on the schedule the account shows, and a bookkeeper should check it again whenever sales grow, because the department can change the frequency. Put the 20th on the calendar as a firm deadline, and file on the business day before if the 20th falls on a weekend.

What about local taxes and the New Orleans return?

The department's registration page tells you to collect the appropriate state and local sales taxes, but it does not explain how local returns are filed, so ask the department or your parish tax office how your location's local tax reaches the right place. A restaurant in Orleans Parish also files a monthly food and beverage return through LaTAP on Form R-1325, which is separate from the sales tax return. Our guide on the New Orleans food and beverage tax covers it.

How do you keep the records the return is built from?

A return is only as good as the sales report beneath it. Set your register to total taxable sales and tax collected by day. Save the report for every period, along with the return and the payment confirmation. Record comps, voids and refunds so the numbers on the return explain themselves. Keep exemption paperwork for any sale you left out of the taxable total, such as a resale of ingredients or a purchase by an exempt organization. If your bookkeeper files for you, ask for a copy of each return after it is submitted.

What happens if you register late or collect without an account?

The department's own warning runs in both directions. Collecting sales tax before you are registered is not allowed, so a restaurant that opens a soft launch weekend and adds tax to the checks without an account has a problem. Selling without registering is the other mistake: the tax is still owed on those sales, and the department decides what interest or penalties apply. The way to avoid both is to register a short time before the first taxable sale, confirm the account is active in LaTAP, and only then turn on tax in your register. If you run a friends and family night before opening, ask your accountant how to treat it.

What should you do next?

Write down three dates: the day you expect your first taxable sale, the date you will register, and the first 20th that follows a month with sales. Then read how Louisiana taxes restaurant meals, so your register is set to the right combined rate on day one. If your restaurant is in New Orleans, add the monthly food and beverage return to the same calendar.

More guides for your business:

• Louisiana sales tax on restaurant meals: state, parish and New Orleans
• New Orleans food and beverage tax for restaurants
• Louisiana food safety certificate for restaurants

More in the US guides for food businesses.