Register your business with MassTaxConnect

Updated: November 10, 2022

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, kindly request a copy with IRS

For more information visit:

• Video: How to Register a New Business in MassTaxConnect
• MassTaxConnect Resources
• Tax types available in MassTaxConnect (MTC).

DOR's Call Center can be reached Monday through Friday at (617) 887-6367 or (800) 392-6089 (toll-free in Massachusetts).

Resources:

• Starting Your Business
• Business Tax Overview
• Sales and Use (Including meals, motor vehicles, and telecommunications)
• Withholding
• Corporate Excise