How to Complete Form DTF-17: New York Certificate of Authority Application

To complete Form DTF-17, New York’s application to register for a sales tax Certificate of Authority, you fill in your business identity and start-date information across the form’s lettered sections, attach a Form DTF-17.1 for every responsible person, and submit it to the Department of Taxation and Finance at least 20 days before your first taxable sale. Most filers use New York Business Express to do it online; paper is available but slower. You cannot make taxable sales, collect sales tax, or accept exemption certificates until the paper Certificate of Authority arrives in the mail.¹

File at Least 20 Days Before Your First Sale

The Tax Department wants DTF-17 in hand at least 20 days before you begin making taxable sales, providing taxable services, or issuing or accepting exemption certificates in New York. For sales tax purposes, your business begins on the date of your first taxable sale or service, not the date you incorporate, sign a lease, or open a bank account.¹

Because you have to wait for the physical certificate before you can operate, file earlier than the minimum if you can. Filing the application is not the same as being registered.²

What to Have in Front of You

Gather this information before you start the form. Missing pieces are the most common reason applications sit in follow-up limbo:

Federal Employer Identification Number (EIN). If your business doesn’t need one, leave it blank and the Tax Department will assign a temporary New York ID.
Legal business name exactly as it appears on your organizing document: your personal name for a sole proprietorship, the name on your Certificate of Incorporation for a corporation, or the name on your Articles of Organization for an LLC.
Trade name (DBA), if you use one. You must have already filed an Assumed Name Certificate with the appropriate county clerk.
Physical business street address. Not a PO box.
Separate mailing address, only if it differs from the physical address. Don’t put your tax preparer’s address here.
A brief description of what you sell or do, plus your NAICS code.
The date you expect to make your first taxable sale. This date sets the filing period for your first sales tax return.
Full personal information for each business contact and responsible person, including anyone who will need to complete a DTF-17.1.

Working Through the Form

DTF-17 is organized into lettered sections. The choices that trip people up sit in Sections A and D.

Section A: Business Status

Mark exactly one box that describes why you’re registering:

Starting a new business — the business has never held a New York Certificate of Authority.
Change in organization — your structure is changing, for example a sole proprietorship converting to an LLC. Enter the effective date. This scenario also requires surrendering the old certificate.
Restarting a prior business — you were previously registered but the certificate expired, was surrendered, revoked, or suspended.
Purchasing an existing business — you are acquiring a business, or its assets, from someone who was required to collect sales tax.
Adding a location — you already hold a Certificate of Authority for other locations and have elected to file one consolidated return. If instead you plan to run each location as a separate entity with its own return, file a separate DTF-17 for each one.

Section B: Business Identification

Line 2 is your legal name, entered exactly as described above. Line 3 is the DBA if you have one. Line 4 is your EIN. Line 5 is the physical street address; Line 6 is the mailing address if it differs. Line 10 asks for at least one email address, which the Tax Department uses to communicate about your application.¹

Section D: General Business Information

Line 12 is the date you’ll begin business. Get this right, because it fixes the starting point for your filing obligations. Line 13 is only for temporary vendors: mark it if your business is seasonal or you don’t expect to operate for more than two consecutive sales tax quarters. Lines 14a and 14b ask, if you have multiple locations, whether you want a separate return for each (14a) or one consolidated return covering all of them (14b). Line 15 is a brief description of your business activities.

Attach a Form DTF-17.1 for Each Responsible Person

Every DTF-17 must include a completed Form DTF-17.1 for each officer, partner, member, shareholder, or employee who is a business contact or responsible person. The Tax Department uses it to identify who can be held personally liable for the business’s unpaid sales tax.³

The business contact section asks for full name, business title, date of birth, home address (not a PO box), phone number, ownership percentage, and email. If the person is also a responsible person, the second page adds Social Security Number or ITIN, country of residence, the date they took on that role, and yes-or-no questions about their authority, including check-signing, preparing tax returns, and making business decisions.

Background questions cover the past five years: judgments or liens, pending charges, government investigations, license revocations, and criminal convictions. These are standard evaluation questions, not automatic disqualifiers. Answer them honestly; leaving them blank stalls the application.

Submitting the Application

Online Through New York Business Express

Go to businessexpress.ny.gov. You’ll need a NY.gov Business account, which is separate from a personal NY.gov account, so plan to create one if you haven’t already. The portal walks you through the same fields as the paper form. At the end you’ll get a confirmation page. Print it and save it. Status updates come by email to the address tied to the account, including notices when the application needs attention or has been approved, and they arrive from noreply.businessexpress@custhelp.com.⁴

Paper by Mail

If you file on paper, send the completed DTF-17 with each DTF-17.1 to:

NYS TAX DEPARTMENT
SALES TAX REGISTRATION UNIT
W A HARRIMAN CAMPUS
ALBANY NY 12227-8600¹

Use a mailing method with tracking. Paper takes longer than online, and a lost envelope directly delays when you can open.

After the Certificate Arrives

You must prominently display the Certificate of Authority at your place of business. If you sell from a truck, cart, or market stand, attach it there. The penalty for failing to display it is $50.²

Your first sales tax return covers the filing period that includes the business start date you entered on the form. File it even if you made no sales in that period.

Adding More Locations Later

Each business location needs its own Certificate of Authority. If you want a single consolidated return, you can add locations through New York Business Express, by sending Form DTF-17-ATT (Schedule of Business Locations for a Consolidated Filer) to the Sales Tax Registration Unit, or by calling the Sales Tax Information Center. Each location gets its own certificate under the same sales tax ID number. If you’d rather run each location as a separate entity, file a fresh DTF-17 for each. The 20-day rule applies to new locations too.²

What DTF-17 Is Not For

DTF-17 is only for the initial registration. Once you hold a Certificate of Authority, don’t use this form to update information. The form instructions say so explicitly, and it’s a common mistake.¹

You must amend your certificate within 20 days when your business name, address (including a new location), federal identification number, business phone, owner/officer/responsible person information, or business activity changes. For address or phone changes, use Online Services at ols.tax.ny.gov, call the Sales Tax Information Center, or file Form DTF-96 (Report of Address Change for Business Tax Accounts). For anything else, use Form DTF-95 (Business Tax Account Update).⁵

If you’re changing your business structure, that’s the one situation where DTF-17 comes back into play: you apply for a new Certificate of Authority at least 20 days before the change, file Form AU-196.10 (Notification of Sale, Transfer, or Assignment in Bulk) with the Tax Department at least 10 days before the change, and surrender the old certificate. If you’re selling the business, give the buyer a copy of Form TP-153 and collect sales tax on any taxable assets included in the sale.⁵

1
New York State Department of Taxation and Finance. Instructions for Form DTF-17 – Application to Register for a Sales Tax Certificate of Authority
2
New York State Department of Taxation and Finance. How to Register for New York State Sales Tax
3
New York State Department of Taxation and Finance. Form DTF-17.1 Business Contact and Responsible Person Questionnaire
4
New York State Department of Taxation and Finance. Register as a Sales Tax Vendor
5
New York State Department of Taxation and Finance. Amending or Surrendering a Certificate of Authority