Massachusetts New Business Registration Guide

Taxes You Must Register For

1. State Withholding Income Tax

2. State Unemployment Insurance (UI) Tax

3. Paid Family and Medical Leave (PFML)

Tax Agencies

• Massachusetts Department of Revenue (DOR) — Income Tax Withholding & PFML

• Massachusetts Department of Unemployment Assistance (DUA) — Unemployment Insurance

• Registration portals:
• MassTaxConnect
• DUA Employer Registration

Step-by-Step Registration Process

Step 1: Register for Withholding and PFML Accounts

1. Go to the MassTaxConnect website

2. Under Quick Links, click Register a New Taxpayer

3. Select Register a Business

4. Choose “I am registering a business, organization, or other entity”

5. Complete all fields to register for both:
• Withholding Account ID
• Paid Family and Medical Leave ID

6. Create a username, password, and PIN

7. Save or print your confirmation page

Step 2: Log In to MassTaxConnect

1. Visit MassTaxConnect

2. Enter your username and password

3. Complete two-step verification via app, email, or text

4. Enter the verification code to gain access

Step 3: Register for Unemployment Insurance

1. Go to DUA Employer Registration

2. Click UI Employer Registration

3. Start the application and receive a temporary user ID and password (valid for 30 days)

4. Complete the full application to receive your Employer Account Number (EAN)

Step 4: Log In to DUA Employer System

1. Use your temporary credentials from registration to log in

2. Reset your password, select a security question, and set a 4-digit PIN

3. Store this information securely for future use

Grant Third-Party Access to Check

For MassTaxConnect:

1. Sign in at MassTaxConnect

2. Click Manage My Profile (top-right corner)

3. Select the More… tab

4. Under Third Party Access, click Assign Access Rights to a Third Party

5. Locate and select Check from the directory or search bar

6. Click Next

7. Under Give Rights, select your withholding and PFML accounts

8. From the Access Rights dropdown, select File and Pay

9. Click Next and then Submit

For DUA UI Online:

1. Visit UI Online for Employers

2. Log in with your user ID and password

3. Navigate to Account Maintenance → TPA Authorization

4. Click New, and enter TPA ID: 111213

5. Set the Beginning Date to today; leave End Date blank

6. Click Add Roles, and select:
• Account Maintenance, Update and Submit
• Payments, Update and Submit
• Employment and Wage Detail, Update and Submit
• EMAC

7. Do NOT select any of the following roles:
• Benefit Charges Protest Submission
• Wage and Separation Mailing
• Any "View Only" roles

Need Help?

• DOR (Withholding & PFML): 617-887-6367

• DUA (UI Tax): 617-626-5075

• MassTaxConnect Tutorials

• Employer Registration User Guide