Register your business with MassTaxConnect

Register your business online. Learn how.

Contact

DOR Contact

Phone

8:30 a.m. - 4:30 p.m., Monday through Friday

Toll-free in Massachusetts 800-392-6089

8:30 a.m. - 4:30 p.m., Monday through Friday

The Details

What you need

To register a business with MassTaxConnect, you will need the following documents and information:

  • Your Social Security number (if registering as a sole proprietor with no employees)
    • Sole proprietors have the option to register with either their Social Security Number or an Employer Identification number.
  • Your Employer Identification Number (EIN).
  • Your legal name
  • Business mailing address
  • Starting date of your business

If you are registering a corporation you will need the above information along with:

  • Contact information for your business officer(s), including:
    • Title(s)
    • Social Security number(s)

If you are registering for an exemption from sales tax as a non profit organization you will need 

  • IRS Determination Letter recognizing your organization as a 501(C)(3)

How to register

To register your business with MassTaxConnect, you’ll need to do the following:

  1. Go to MassTaxConnect.
  2. Click Register a New Taxpayer.
  3. Click Register a Business.
  4. Follow prompts and enter the appropriate information.

Next steps

Your authentication code

After you register, you’ll receive an email with an authentication code. You’ll need the code to login to MassTaxConnect for the first time.

Contact

Address
100 Cambridge Street, Boston, MA 02114
Phone

8:30 a.m. - 4:30 p.m., Monday through Friday

Toll-free in Massachusetts 800-392-6089

8:30 a.m. - 4:30 p.m., Monday through Friday

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