Part one answers whether an obligation has arisen for you and in which states: seller of record, two kinds of nexus, thresholds across 46 jurisdictions and the self-check. If you have not yet produced the list of states and dates, start there - without it, nothing below has anything to be applied to.
01 - The agencyWhere the application goes
Sales tax registration happens with a different agency from the one that formed your company. The Secretary of State is the wrong door here: it keeps the corporate register and has nothing to do with tax. Sales tax sits on the revenue side, which means a Department of Revenue in most states and the Comptroller of Public Accounts in Texas.
New York stands apart and issues a Certificate of Authority rather than a permit. The difference is not only terminological: the document is found under a different name and on a different page, and an owner searching for a New York sales tax permit can conclude that no such document exists.
The application itself is filed online almost everywhere and is completed in one sitting, because a half-finished form does not save in most systems. Some states charge a registration fee and some issue the permit at no cost, with the amount set out in that state's own fee schedule. There is no single processing time: each of the 46 jurisdictions runs its own system at its own pace, so planning a launch date around a permit is not something a general rule supports.
If your list has several states on it, the registrations run independently of one another: one does not speed up or replace another, and there is no interstate single window for this.
02 - The formWhat the application fields decide
The fields look like formalities and are usually completed quickly. Each of them does something specific with what you type, and two of them shape your life afterwards more than the rest.
| Application field | What the state does with it |
|---|---|
| Legal entity name and state of formation | matched against the record in the state register, so it goes in exactly as that record holds it, not as your trade name or DBA |
| Formation date | fixes when the entity itself began, which is a different date from the one two rows below |
| EIN | the identifier the department keys the tax account to |
| NAICS code, 6 digits | classifies what you sell, and in some states drives which taxes the account is opened for |
| Date you crossed the threshold | sets the effective date on the permit, and with it the first period you owe a return for |
| Projected sales into that state | the filing frequency is assigned from this figure and revised later against reality |
| Responsible party: name, title, home address, SSN or ITIN | names the human being who answers for the tax; that person is personally exposed if collected tax never reaches the department |
The date you crossed the threshold matters because you report it yourself and it retrospectively determines which period your liability starts in. The temptation to enter today's date is understandable, but that field is later checked against your own sales export if the department decides to look more closely.
The responsible party is the only place on the application where an individual with personal exposure appears, and it is the field where completion most often stops. The exposure arises where tax was collected from buyers and never reached the department, and the company's limited liability does not work here the way it does in an ordinary commercial dispute: collected tax is treated as state funds held by you rather than as your revenue.
For a non-resident owner this creates a difficulty of its own. The field is built around a social security number, which a foreign founder may not have at all, and an ITIN is often not yet in hand at the point of registration. There is no single answer across all states: some accept an ITIN, some handle the field differently, and in some the application does not go through the online portal at all. This is settled with the specific state before you start, because it cannot be resolved halfway through a form.
03 - The permitWhat the permit says and why it matters
When the permit arrives it needs reading rather than filing away. It carries three things: an account number, an effective date and a filing frequency, and the last of these is the shape of your year.
You do not choose the frequency. The state assigns it from the sales projection you gave on the application and changes it later as real numbers arrive. Monthly is 12 returns a year, quarterly is four, annual is one, in every state where you hold a permit. Five permits at quarterly frequency is twenty returns a year, which is worth thinking about before opening the fifth.
Then comes the rule that catches people out more than any other: you file in periods with no sales at all. A return is a report rather than a payment, so a zero return is still a return. The obligation is created by the permit, not by the revenue, and a missing zero return can carry the same late penalty as a missing return with tax owing on it.
Which leads directly to anyone wondering whether to open permits as a precaution while they are dealing with the topic anyway. A permit opened where no obligation existed does not make you more careful - it issues a filing calendar that would not otherwise exist, and that calendar runs until the registration is closed.
04 - The rateWhich rate to charge the buyer
Most states are destination-sourced: the rate follows the buyer's address and stacks state, county, city and special district rates on each other. That is why two buyers living ten miles apart pay different totals on the same item, and why a single state rate is almost never what you actually charge.
Some states apply origin sourcing, where the rate comes from the seller's address, and Texas and Ohio are among them. But the origin rule operates inside the state, between a seller and a buyer both located in it. If you sell into a state from outside and the obligation arose through the economic threshold, you are a remote seller for that state, and the rate follows the buyer's address even where local sellers use origin sourcing. For a non-resident's company that means almost all trade runs on destination rules.
Technically your checkout applies the rate, and generally applies it correctly. But you answer for it being right, not the developer of the application, so the address and tax zone settings are worth testing on a few real orders after registration rather than trusting the defaults.
05 - CertificatesExemption certificates: the thing dropped first
Not every buyer pays tax. Resellers, non-profits and manufacturers buying inputs claim an exemption, and instead of the tax you keep a certificate. The mechanics are simple: no certificate, no exemption, and that rule bites not at the moment of sale but at the moment of audit.
In an audit, an exempt sale with no certificate behind it counts as a taxable sale. The difference is that the tax then comes out of your margin rather than the buyer's wallet: the deal closed long ago, the buyer owes nothing, and you pay. Certificate collection is the only thing standing between a seller with wholesale customers and an assessment, and it needs setting up when sales start, not when an audit notice arrives.
In practice that means a field on the order form or a simple procedure on the account manager's side: a customer claiming an exemption does not get an invoice without tax until the certificate is in your file. Certificates expire in some states, so for regular wholesale customers they are refreshed periodically.
06 - The exitClosing a registration is its own act
A registration you no longer need keeps generating the obligation to file returns until you close it. Stopping sales does not stop the filings: the account stays open, the reporting periods keep running, and penalties for missing them accrue exactly as if the business were trading.
Closing is done with the same department that issued the permit, and it is a separate procedure with its own form. This is one of the most common reasons a notice from a state revenue department reaches the owner of a line of business that shut down a year ago: the sales stopped, and the account stayed open the whole time.
Closing registrations belongs inside the process of leaving a state or winding up the company, rather than being left until somebody reminds you. For the company's annual obligations generally, we have a separate guide to annual compliance for non-residents.
07 - The pastWhen the nexus date sits behind you
A separate conversation is needed for anyone whose table from part one carries dates in the past rather than the future. The threshold was crossed in March, the registration happened in November, and eight months sit behind you. The tax for those months was yours to charge buyers at the time, and it is your liability now whether or not you charged it. You cannot go back to buyers and collect it retrospectively, so it comes out of your own funds.
Two routes lead out. The first is to register with the true nexus date and file back returns for the past periods, which is reasonable where the exposure is small and considerably less pleasant where it is not. The second is to approach the state through a voluntary disclosure agreement. Most states run such a program for sellers who come forward before the state finds them: you register, file and pay for a defined look-back period, and in exchange the state limits how far back it reaches and generally waives penalties. Interest usually survives.
The relief under a VDA is built for a seller who never charged the tax to buyers. If you did charge it at checkout and did not remit it, the look-back limit generally does not apply to those amounts: the money is treated as state funds you were holding. Texas puts it plainly - there is no limit on the look-back period for taxes collected and not remitted, and interest on those amounts is not waived, although penalties and interest are waived on everything else.
Voluntary disclosure also stops being available once you have registered in the ordinary way. A letter from a state revenue department is a poor place to learn that the option existed.
The differences between states matter more here than anywhere else in this guide. What the program is called, how long the look-back runs, whether the state runs it directly or through a multistate body, and what exactly it waives are all set state by state, and no general article settles any of that for a specific state.
The choice between filing the back periods openly and voluntary disclosure is made once, and before anything at all has been filed. This is the point where a state and local tax specialist normally comes in: from here the conversation is no longer about registration but about negotiating with a state.
08 - The outcomeThe order of work for each state on the list
Everything above adds up to a short sequence that repeats for every row of your table. What differs between states is names and timings, not the order of the steps.
Deal with the past first, if there is any
If the date in the row has already passed, the choice between back returns and voluntary disclosure is made before the application goes in, not after. Registering in the ordinary way closes the second route.
Find the state revenue department and file
A Department of Revenue in most states, the Comptroller in Texas, a Certificate of Authority in New York. Gather the form data in advance: it does not save half-completed.
Enter an honest crossing date and name a responsible party
The first sets the period from which returns are owed. The second is a real person with personal exposure for the collected tax, and for a non-resident owner the SSN or ITIN question is settled with the state beforehand.
Read the permit and put the frequency in a calendar
Account number, effective date and filing frequency. The calendar goes in immediately, because the first missed period is usually a zero one and the penalty for it is the same as for a period with tax due.
Set up the rate and certificate collection
Test on real orders that the checkout is applying the right sourcing model, and put in place a procedure where an exempt customer does not receive an invoice without tax before the certificate reaches you.
Put closing the registration into the exit plan
Not at the point where somebody reminds you. While the permit is open the reporting periods keep running, even if the sales stopped long ago.
One row of the table, one such cycle. If there were no rows at all, none of this needs doing, and the check from part one is worth repeating when volumes grow appreciably or stock appears in a new state.
09 - FAQFrequently asked questions
Both parts of this guide rest on one distinction, and it is worth stating at the end. The obligation is created by nexus; the work is created by the permit. The first arises regardless of what you want, the second only once you have opened a registration yourself.
This article sets out the rules in general terms. It is not tax advice for your business and it is not a substitute for reading the relevant state's code. The material was verified in August 2026 against state revenue department documents and state statutes. Corporatee is a US business formation firm.
Part one: does your LLC have to register for sales tax.
The process is the same in one state or ten; the volume of work is not
Applications, permits, returns on the frequency the state assigns, and closing registrations that are no longer needed. Where the nexus date sits in the past, we start there.