Register your business with MassTaxConnect

Register your business online with the Massachusetts Department of Revenue.

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The Details

What you need

MassTaxConnect is the Department of Revenue's web-based application for filing and paying taxes. 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) - If you don't have an EIN, please apply for an EIN with the IRS.
  • Your legal name
  • Business mailing address
  • Starting date of your business

Corporations will need the above information along with:

  • Contact information for business officer(s), including title(s) and social security number(s).

Non Profit Organizations will need: 

  • IRS Determination Letter recognizing an organization as a 501(C)(3) - If you don't have a copy of a Determination Letter, please request a copy with IRS

How to register

To register your business go to MassTaxConnect.

When you register on MassTaxConnect you will immediately receive an email confirming your registration request has been received.

Once your registration has been approved you will receive another email letting you know that you can now log in. This second email will contain a link directly to MassTaxConnect with an authentication code. 

For more information select Registration which can be found under MassTaxConnect's Frequently Asked Questions

More info

For more information select Registration which can be found under MassTaxConnect's Frequently Asked Questions

DOR's call center hours for help are 8:30 a.m. - 4:30 p.m., Monday through Friday. (617) 887-6367 or (800) 392-6089 (toll-free in Massachusetts)

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