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.
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
State fee. $0 for the Certificate of Authority itself. Our flat fee covers preparing and filing the application.
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 rather than 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.
What comes next
Not applicable to a registration, but 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 exactly which accounts you need, prepare and submit each registration, and hand you the account numbers, rates, and deposit schedules your payroll system asks for. One flat price per account, and any state fee passed through at cost.
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 rather than discovering it 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.
Questions and answers
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 rather than 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.
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.
Agency details verified 2026-08-03