Before you begin
MassTaxConnect is DOR's online application for registering, filing and paying taxes.
Before registering, you should answer the following:
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What kind of organization will my business be?
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Do I need an Employer Identification Number (EIN/FEIN) from the IRS?
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What kind of taxes do I need to register for?
What you need
To register your business with MassTaxConnect, you will need your:
- Social Security number if registering as a sole proprietor with no employees
- EIN/FEIN - Required for all businesses including sole proprietors with employees
- Start date of your business
- Legal and mailing addresses.
All businesses except sole proprietorships will need the above information along with:
- Contact information for owners/officers including their
- Titles and Social Security numbers.
Non profit organizations will need an IRS Determination Letter recognizing an organization as a 501(C)(3).
If you don't have a copy of a Determination Letter, you can request a copy with IRS.
Register as a business (including sole proprietorships) who have never filed MA taxes
Businesses are required to register with an EIN/FEIN in MassTaxConnect.
Sole proprietors must register under their Social Security number. A sole proprietor with employees must also provide an EIN/FEIN.
Getting Started
To learn how, view these instructions along with the registration video tutorial.
On the upper right-hand side of MassTaxConnect's home screen:
You may also register by clicking on Register a New Taxpayer under Quick Links. |
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- Choose Register a New Business.

- Provide the required registration information.
- Set up two-step verification.
- When complete, you will receive a confirmation email.
- You will receive a mailed registration certificate depending on the tax(es) you register for.
Register as a sole proprietor who has filed MA taxes
You will already be in DOR's system if you (or a third party on your behalf) have previously filed MA taxes such as personal income.
Getting Started
If you have filed taxes with DOR, there are 2 steps to register your business as a sole proprietorship in MassTaxConnect.
Step 1: Create a MassTaxConnect Logon
To learn how, view these instructions and the logon video tutorial.
On the upper right-hand side of MassTaxConnect's home screen:
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- Choose Create My Logon.

- Choose I am an individual who has previously filed taxes in MA.

If you can't find tax information to verify who you are when creating your logon, contact DOR, and request a Notice of Account ID.
- Finish the remaining instructions.
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When complete, you will be on your Summary page and ready to register your business.
Step 2: Register Your Business
To learn how, view these instructions and the registration video tutorial.
- From the Summary page, choose More.

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- You will receive a mailed registration certificate depending on the tax(es) you register for.
Activate two-step verification
DOR uses two-step verification to protect your MassTaxConnect account. When registering, MassTaxConnect will prompt you to set up two-step verification.
Set up your two-step verification by choosing one of the following:
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Authentication App (such as Google Authenticator)
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Text Message
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Email.
View the two-step verification video tutorial.

Add an account (tax type), new location, or new license
If your business is already registered with MassTaxConnect, you can easily add an:
- Account (tax type)
- New location
- New license.
Examples
- You are registered for sales and use tax and want to register for meals and withholding.
- You are opening another store where you sell TVs and appliances.
- You have a convenience store and now want to sell cigarettes.
Getting Started
- Log in to MassTaxConnect.
- From the Summary page, choose More.

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- You will receive a mailed registration certificate depending on the tax(es) you register for.
Registration certificates
Once approved, you will receive a mailed certificate for each location for the following tax types:
- Cigarette License
- Cigars License
- Electronic Nicotine Delivery Systems License
- Marijuana Retail
- Meals
- Sales and Use
- Telecommunications
- Room Occupancy
Each certificate must be posted and visible at all times.
Sample Sales and Use Tax Registration Certificate

Contact
Tax Department: Contact Center hours are 9 a.m. – 4 p.m., Monday through Friday.
- (617) 887-6367 or
- (800) 392-6089 (toll-free in Massachusetts).
For more ways to connect, go to Contact DOR.
Ask your question through a MassTaxConnect e-message
If registered, log in to your MassTaxConnect account and send DOR a secure e-message.
- From the MassTaxConnect Summary page, choose More.

- Choose Messages.
- Select Manage Messages.
- Send message.
Do you need to register with MassTaxConnect?
If you need to register with MassTaxConnect, go to:
- Register as a business (including sole proprietorships) who have never filed MA taxes
- Register as a sole proprietor who has filed MA taxes.
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