Register Your Business with MassTaxConnect

Updated: November 13, 2023

Before you begin & what you need

MassTaxConnect is DOR's online application for registering, filing and paying taxes.

Before registering, you should answer the following:

• What kind of organization will my business be?

• Do I need an Employer Identification Number (EIN/FEIN) from the IRS?

• What kind of taxes do I need to register for?

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
• Your business's 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).

Register as a business (including sole proprietorships) that 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: Choose Sign Up. You may also register by clicking on Register a New Taxpayer under Quick Links.

• Choose Register a New Business.

• Provide the required registration information.
• When complete, you will receive a confirmation email.
• When you log in for the first time, you will be prompted to set up two-step verification.
• You will receive a mailed registration certificate depending on the tax(es) you register for.

Video: Register a New Business in MassTaxConnect  Apply for an Employer Identification Number  Tax types to choose from in MassTaxConnect 

Register as a sole proprietorship that 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: Choose Sign Up.

• 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.

You will receive a confirmation email with a link to MassTaxConnect.  Select the link which will take you to MassTaxConnect's home screen. Your new user name and password will already be filled in. Select Log in to activate two-step verification.

• 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.

 

Under Access, choose Add an Account, New Location or New License. Provide the required registration information. When complete, you will receive a confirmation email.

• You will receive a mailed registration certificate depending on the tax(es) you register for.

Video: How an Individual can Create a MassTaxConnect Logon Account  Video: Two-step Verification in MassTaxConnect  Apply for an Employer Identification Number 

First time log in with two-step verification

DOR uses two-step verification to protect your MassTaxConnect account. After your registration is approved, MassTaxConnect will prompt you to set up two-step verification.

Set up your two-step verification by choosing one of the following:

• Authentication App (such as Google Authenticator)

• Text Message

• Email.

View the two-step verification video tutorial.

Video: Two-step Verification in MassTaxConnect 

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.

 

Under Access, choose Add an Account, New Location or New License. Follow the remaining instructions. When complete, you will receive a confirmation email.

• You will receive a mailed registration certificate depending on the tax(es) you register for.

Video: How to Add an Account (Tax) Type  Tax types to choose from in MassTaxConnect 

Registration certificates

Once approved, DOR will mail you a certificate for each location you have, if you are registered for any the following:

• 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

Related resources

DOR Guides for Business Taxes  DOR's Business Taxes Homepage   About MassTaxConnect  FAQs: DOR Certificate of Good Standing and Corporate Tax Lien Waiver  DOR Estimated Tax Payments  Power of Attorney (POA) and Third-Party Authorization  DOR Legal Library  Secretary of the Commonwealth: Corporations  Department of Unemployment Assistance (DUA)