Form DOF-1, Change of Business Information, is the New York City Department of Finance (DOF) form for reporting a change in your business's name, billing or business address, or telephone number. Businesses with a DOF business tax account use it to correct or update their tax records, entering the old and the new information side by side. On this page you can fill out the form online on FillingPDF and download or print the completed PDF; the DOF publishes the original 2025 form at nyc.gov and receives the completed form by mail.
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What is DOF-1?
Form DOF-1, Change of Business Information, is the New York City Department of Finance (DOF) form that a business sends to report a change in its name, identification number, billing or business address, or telephone number so that its business tax records stay correct.
The DOF describes the form as a simple and convenient way to correct or update your business tax records. It is not a tax return and calculates no tax. The form has two blocks. In OLD INFORMATION you enter what the DOF has on file, starting with the Entity ID (EIN or SSN), which the DOF needs in order to make any account change. In NEW INFORMATION you enter the effective date, the entity type (Individual, Partnership or Corporation) and the revised trade name, legal name, business address, telephone number and, for commercial rent tax filers only, a billing address and email address.
The instructions define the terms the form uses. The legal name is the name under which the business owns assets or incurs debts: the sole proprietor's name, the name filed with the New York Secretary of State for a corporation, or the name used in the partnership agreement. The trade name is the name used in day-to-day business.
The DOF page for the business corporation tax lists DOF-1 among its forms and also points to a DOF-1 Online option. The form itself says you can change name or address information online with a business tax web profile at www.nyc.gov/eservices.
Who needs to file DOF-1?
Any business with a New York City Department of Finance business tax account whose records need updating files Form DOF-1. The instructions ask for a completed form whenever there is a change in the business's name, ID number, billing or business address, or telephone number. A change of entity is also a listed reason for change.
Who is covered, by entity type:
- Individual: sole proprietors and self-employed professionals, and a single member limited liability company owned by an individual and disregarded for federal income tax purposes.
- Partnership: partnerships, and a limited liability partnership or limited liability company treated as a partnership for federal income tax purposes.
- Corporation: corporations, and a limited liability company treated as a corporation for federal income tax purposes.
The Billing Address c/o section is for commercial rent tax filers only.
If nothing about your business's information has changed, you do not send the form: the DOF says to keep it in your files and complete it when a change occurs. The form names no one who may sign for the business; it has one signature block asking for signature, title and date.
When to file DOF-1
Send Form DOF-1 as soon as a change occurs in your business's name, ID number, billing or business address, or telephone number. The form says that once you complete it you should mail it immediately.
Enter in the NEW INFORMATION area the effective date, meaning the date the new information took effect, in month, day and year. The form sets no other deadline and prints no processing time.
If there are currently no changes to your business's information, keep the blank form in your files and complete it when a change occurs. Because the DOF cannot change an account without the old Entity ID, have the number that appears on your DOF mailing labels, or the one you entered on your last tax return, at hand before you start.
How to fill out DOF-1
Enter your old Entity ID and names
In OLD INFORMATION, enter the entire 9-digit Entity ID (EIN or SSN) currently used for your business tax account. Then enter the Trade Name (DBA, etc.) and Legal Name as the DOF has them.
Enter your old address and phone
Enter the old Business Telephone Number and the old Business Address, City, State, Zip Code and Country (if not US). The business address is where your major business activity is physically located.
Enter the effective date
In NEW INFORMATION, enter the EFFECTIVE DATE with the month, day and year (nn-nn-nnnn) on which the new information became effective.
Check the entity type
Check one box: Individual, Partnership or Corporation. Follow the instructions for LLCs and LLPs, which depend on how the entity is treated for federal income tax purposes.
Enter new ID and names
Enter the new 9-digit Entity ID only if you received a new EIN or otherwise changed your number; otherwise leave it blank. Enter the new or revised Trade Name (DBA, etc.) and Legal Name.
Enter your new address and phone
Enter the new Business Telephone Number and the new Business Address, City, State, Zip Code and Country (if not US). Give the number where you can usually be reached during normal business hours.
Complete billing address and email
Commercial rent tax filers only: enter the Billing Address c/o, City, State and Zip Code where you now want all tax returns and notices sent, including any post office box. Add your Email Address; leave the billing address blank if there is no change.
State the reason for change
Under Reason(s) for change, write the specific reason or reasons for sending the form, for example change of name, change of ID number, change of entity or change of address.
Sign, review and download the PDF
Sign and enter your Title and the Date in the SIGN HERE block. Check that the old Entity ID is complete, then download or print the completed PDF from FillingPDF and mail it as described under How to submit.
How to submit DOF-1
You can submit the change by mail, or you can make a name or address change online instead of using the paper form.
- By mail: send the completed and signed form to New York City Department of Finance, Entity Processing Unit - DOF-1, 59 Maiden Lane, 19th Floor, New York, NY 10038. The form tells you to mail it immediately once completed.
- Online: the form says you can change your business name or address information online. Log on to www.nyc.gov/eservices and sign up for a business tax web profile, which you can also use to view accounts, make payments and change account information.
- Additional forms: call 311. From outside the five NYC boroughs, call 212-NEW-YORK (212-639-9675). The form is also available at www.nyc.gov/finance by searching "DOF-1."
The form names no fee and requires no attachments. FillingPDF lets you fill out and download the PDF; submission follows the channels above.
Common mistakes to avoid
- Leaving the old Entity ID (EIN or SSN) blank or incomplete; the instructions say this number must be entered for the DOF to make any account change, and it must be the entire 9-digit number.
- Filling in the new Entity ID, billing address or other new fields when nothing changed; the instructions say to leave those spaces blank if there is no change.
- Completing the Billing Address c/o section when you are not a commercial rent tax filer; the form reserves it for those filers only.
- Checking the wrong entity type for a limited liability company; the instructions tie the box to its federal income tax treatment (partnership, corporation, or individual if single-member and disregarded).
- Entering the corporation's trade name in the Legal Name line; for a corporation the legal name is the one filed with the New York Secretary of State.
- Mailing the form unsigned, or without the title and date next to the signature.
- Leaving the reason for change blank instead of naming it, such as change of name, ID number, entity or address.
- Sending the form when there is no change; the DOF says to keep it in your files and send it only when a change occurs.
Frequently asked questions
What is Form DOF-1 used for?
Form DOF-1 is the NYC Department of Finance form for reporting a change in your business's name, ID number, billing or business address, or telephone number. It updates your business tax records; it is not a tax return and calculates no tax.
Can I change my business address with the DOF online instead of mailing Form DOF-1?
Yes. The form says you can change business name or address information online by logging on to www.nyc.gov/eservices and signing up for a business tax web profile. The paper DOF-1 is the alternative, mailed to the Entity Processing Unit.
Where do I mail Form DOF-1?
Mail it to New York City Department of Finance, Entity Processing Unit - DOF-1, 59 Maiden Lane, 19th Floor, New York, NY 10038. The form tells you to mail it immediately after completing it. It names no other mailing address.
When should I send Form DOF-1?
Send it as soon as a change occurs in your business's name, ID number, billing or business address, or telephone number. If nothing has changed, do not send it; the DOF says to keep the form in your files until a change occurs.
Do I need my Entity ID to complete Form DOF-1?
Yes, for the old information. The DOF cannot make an account change without it. Enter the entire 9-digit EIN or SSN shown on your DOF mailing labels or entered on your last tax return, then enter a new number only if it changed.
Which entity type do I check for an LLC on Form DOF-1?
It depends on federal income tax treatment. Check partnership for an LLC or LLP treated as a partnership, corporation for an LLC treated as a corporation, and individual for a single-member LLC owned by an individual and disregarded for federal income tax.
Is Form DOF-1 used for NYC property tax?
No. The DOF-1 instructions describe it as a way to correct or update your business tax records: name, ID number, billing or business address, and telephone number. The DOF lists it among its business tax forms.
Can I fill out Form DOF-1 online on FillingPDF?
Yes. You can fill out the 2025 DOF-1 PDF online on FillingPDF and download or print it. FillingPDF is an independent service and does not send the form to the DOF; you mail it to the Entity Processing Unit or use the DOF's online option.
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