New York · Sales tax registration
New York Certificate of Authority, done for you.
New York bookends this neatly and almost nobody notices. You must apply at least 20 days before you start making taxable sales, and if you later stop, the final return is due within 20 days of ceasing. Twenty days in, twenty days out, and both catch people who were watching a quarterly calendar.
Last updated:
Who you are dealing with
New York State Department of Taxation and Finance
- Handles:
- Sales tax Certificate of Authority
- System:
- New York Business Express
- Form:
- Form DTF-17, Application to Register for a Sales Tax Certificate of Authority, filed at least 20 days before you begin business in New York State
New York State Department of Taxation and Finance, sales tax registration
File DTF-17: register for New York sales tax
It goes to the agency named above, through the system listed beside it. We prepare it, file it, and send you the written confirmation.
State fee. $0 for the Certificate of Authority itself. Our flat fee covers preparing and filing the application.
Our fee. $180 per state, flat. State fees are passed through at cost.
When you have to register
Apply at least 20 days before you begin making taxable sales in New York State. It is measured from when you start selling, not from incorporation or from opening a bank account, so a business that forms early and sells later has more room than it thinks, and one that forms and sells the same week has none. A seller with no physical presence in New York is caught only by a test with two halves, and both have to be true: over the immediately preceding four sales tax quarters, cumulative gross receipts from sales of tangible personal property delivered into the state exceeded $500,000, AND you made more than 100 such sales. Note the and. Most states join their two numbers with or, so a business that has crossed elsewhere may be nowhere near the line in New York, and one watching only a dollar figure can miss that the sale count matters too.
What comes next
Worth pairing now. If you later cease business, sell, transfer, or even change the form of your business, the final return is due within 20 days and the Certificate of Authority is surrendered. Changing from a sole proprietorship to an LLC counts, and the new entity needs its own certificate.
How long it takes
The certificate is mailed to you within five business days of a complete application. That is a published, specific turnaround, which is rare in this work, and it is why the 20 day rule is not as tight as it first sounds. The lead time is for you, not for the state.
What we do
We work out which accounts you need, submit each registration, and hand you the account numbers, rates, and deposit schedules your payroll system asks for. One flat price per state, and any state fee passed through at cost. You keep the client. We never email them.
What makes New York harder than average
- You cannot sell legally while you wait. The 20 day rule exists because the certificate has to be in hand before taxable sales begin. It is not a filing deadline you can be late on and catch up, it is a prerequisite, which is a different kind of problem.
- The application asks for bank account information. Alongside the business name and purpose, the reason for applying, and the EIN, New York asks for banking details and the date you plan to begin selling. That last date is what the 20 days runs from, so it is not a throwaway field.
- Restructuring means a new certificate. Because changing the form of the business triggers a final return and surrender, converting a sole proprietorship into an LLC means the new entity applies afresh. Plan the 20 days into the restructure, so it does not surface mid-conversion.
- Twenty days each way, and nothing else in New York uses that number. The withholding side runs on 30 days from ceasing to pay wages. Same state, same wind-down, two different clocks.
How New York compares
If New York is one of several states on the list, the order you register in changes what each one asks for.
Questions and answers
What is a New York Certificate of Authority?
The NYS Certificate of Authority is New York's sales tax registration: the document from the Tax Department that gives you the right to collect sales tax on taxable sales and to issue and accept most New York exemption certificates. You apply for it on Form DTF-17 through New York Business Express.
Is the Certificate of Authority the same as a sales tax ID number?
Same registration, two names people use. The certificate is the document New York mails you; the sales tax identification number printed on it is what filings and exemption certificates quote. A business with several locations gets one number carried on each location's certificate.
How far ahead do I need to apply in New York?
At least 20 days before you begin making taxable sales. The certificate has to be in hand before you sell, so this is a prerequisite, not a deadline you can catch up on.
How long does the certificate take to arrive?
New York mails it within five business days of a complete application. That published turnaround is why the 20 day lead time is workable.
Is there a temporary New York Certificate of Authority?
Yes. If you expect to make taxable sales in New York for no more than two consecutive sales tax quarters in any 12 month period, you may apply for a temporary Certificate of Authority instead of the regular one. Show and craft fair sellers are the usual case. The same 20 day lead time applies.
What does the application ask for?
The name and purpose of the business, the reason for the application, your federal EIN, contact details, bank account information, and the date you plan to begin selling in New York.
I am converting my sole proprietorship to an LLC. Do I need a new certificate?
Yes. Changing the form of the business means a final return and surrender of the existing certificate, and the new entity applies for its own. Build the 20 days into the conversion timetable.
What do you need from me to start?
The legal name and EIN, entity type, the nature of what you sell, New York locations, banking details for the application, and the date you intend to begin taxable sales.
Do I have to display the NYS Certificate of Authority?
Yes, prominently, at your place of business and at every additional location. If you have no permanent physical location you attach it to the truck, cart, wagon, stand, or other facility you sell from. Failing to display it properly carries a $50 penalty.
Do I need a separate certificate for each location?
Yes. There is one Certificate of Authority per business location. If you run several locations as one business you can register them together through New York Business Express, and each location gets its own certificate carrying the same sales tax identification number. If you operate the locations as separate legal entities, each one applies on its own.
What is the difference between a regular and a temporary Certificate of Authority?
A regular certificate covers a business that sells on an ongoing basis, including from home, a stand, a cart, or a craft or antique show. A temporary certificate is for a business expecting to make taxable sales in no more than two consecutive sales tax quarters in any 12 month period, and it is issued with a start and end date. You can hold only one temporary certificate in a 12 month period, and show and entertainment vendors cannot use one at all.
What happens if I sell in New York without a Certificate of Authority?
New York penalises it by the day. Up to $500 for the first day you do business without a valid certificate, then up to $200 for each day after, to a maximum of $10,000. This is the reason the 20 day lead time matters more here than a filing deadline would.
Do I still file NYS sales tax returns in a quarter with no sales?
Yes. Once the certificate is issued you are in business for sales tax purposes even if you never make a sale, so the returns are due on time regardless. There are penalties for filing late even when you owe no tax.
I lost my certificate. Can I get another copy?
Yes. If you are already registered and the original was misplaced or destroyed, the Tax Department issues a duplicate. The number for that is 518-485-2889.
Also in New York
Agency details verified 2026-09-03
About the provider
Regcrest LLC is a document preparation and filing service based in Allentown, Pennsylvania, founded in 2026. It prepares and files state payroll and sales tax registrations, account closures, and resale certificates on behalf of the businesses that instruct it, and works behind accounting firms, bookkeepers, and payroll providers as well as directly with businesses.
Regcrest LLC is not a CPA firm and not a law firm. It gives no tax or legal advice. It files in all 50 states, and publishes a full page for the 29states it has verified against the agency's own material so far, each one showing the date it was checked. For anything that turns on your specific situation, ask a licensed accountant or attorney.