New Company Registration for Massachusetts

Disclaimer: This article is not intended to be tax, legal, financial, or HR advice. Rules and regulations change over time and can vary by location. Consult with a lawyer, accountant, Tax, or HR expert for specific guidance.

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Register for Taxes with Middesk

Homebase has partnered with Middesk to make Massachusetts tax registration easier for you. To get started, sign up here and check out this tutorial, or follow the steps below to register yourself with Massachusetts directly. 

• After registering with Middesk, don’t forget to grant TPA to our tax partners at Check through the MA tax portals. Refer to the TPA instructions below in this article for more information.

  • Check’s TPA ID for MA Unemployment tax is: 111213

  • Search for Check in the MassTaxConnect portal to grant TPA for state income tax

• Middesk will continue to support your ongoing compliance by processing and surfacing your state mail for your review

Once Middesk has registered for you, don’t forget to enter your state tax ID into Homebase in the Payroll Tax Settings page.

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State Withholding Income Tax & Paid Family and Medical Leave

Tax Agency: Massachusetts Department of Revenue

Registering for a Withholding Account ID and Paid Medical & Family Leave Account ID

1. Go to the MassTax Connect website
2. Under Quick Links, click on register a new taxpayer
3. Under registration options, click Register a business
4. Click on I am registering a business, organization, or other entity
5. Choose organization type and choose if you are a nonprofit organization
6. Follow the remaining instructions to register for employer withholding and Paid
   Family and Medical Leave (PFML)
7. You will also create a PIN#, username and password to set up your
   MassTaxConnect Online Profile
8. Once you submit your request, make sure to print or save the information on the
   confirmation page for your records. You will need this info when you log in to
   MassTaxConnect for the first time.

Signing In to MassTax Connect

1. Go to the MassTaxConnect website and log in for the first time
2. Click log in and enter your username and password set up during registration
3. You will be asked to set up two-step verification on your first log on. This can be set up via an app, email, or text message. You will receive a security code from the option you choose
4. Enter the security code

Important to Note

• Update your Homebase account with your Withholding Account ID Number and your Paid
  Family and Medical Leave ID Number. Your account numbers are required for all
  Massachusetts Department of Revenue interactions to ensure your accounts are
  accurate
• If you have any questions regarding this process, please contact the Department of
  Revenue at 617-887-6367.
• For additional assistance, MassTaxConnect video tutorials are available.

Granting Third-party Administrator (TPA) Access

1. Sign in to your MassTaxConnect account
2. In the top-right corner of the page, click the Manage My Profile link
3. Click the More... tab
4. Under the “Third Party Access” section, click the Assign Access Rights to a Third Party
5. Under the “Third Party Public Directory” list, select Check*
6. You can also search for Check by typing in the filter bar and clicking Enter.
7. Click Next and you will see a list of your tax accounts
8. Under “Give Rights” column, check the box for your withholding tax account and your paid family and medical leave account
9. Under the “Access Rights” column, from the drop-down list, select File and Pay
10. Click Next and confirm you’ve granted the correct access to Check
11. Click Submit
    1. Note: For additional assistance, MassTaxConnect video tutorials are available.

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State Unemployment Insurance (UI)

Tax Agency: Massachusetts Department of Unemployment Assistance

Registering for State Unemployment Insurance

1. Go to the Mass.gov
2. Click UI employer registration
3. Once you begin the employer registration process, you will get a temporary user ID and password that is valid for 30 days
4. Go to “Beginning a New UI Registration” and complete information
   Update your Homebase account with your Employer Account Number. Your EAN is required for all Massachusetts Department of Unemployment Assistance interactions to ensure your account is accurate.
   If you have any questions regarding this process, please contact the Department of Unemployment Assistance at 617-626-5075.

Signing In to Your Employer UI

1. After you complete the registration process, you will use the permanent user ID and temporary password from the Registration Status page to log in for the first time.
2. Reset your password
3. Select a security question
4. Enter a 4-digit PIN
5. Be sure to keep this information in a secure location for future use
   For additional assistance, an Employer Registration User Guide is available

Granting Third-party Administrator (TPA) Access

1. Go to the DUA online system.
2. Click on Log In to UI Online for Employers
3. Log in with your User ID and password
4. Click Account Maintenance.
5. Click on the Third Party Administrator (TPA) Authorization link.
6. Click New at the bottom of the screen, and input Check’s TPA ID: 111213
7. Choose today’s day as the "Beginning Date", and leave "End Date" blank.
8. Click Add Roles and ONLY select:
   1.  Account Maintenance, Update and Submit
   2. Payments, Update and Submit
   3. Employment and Wage Detail, Update and Submit
   4. EMAC
   5. Please DO NOT select any of the following roles:
      1. Benefit Charges Protest Submission
      2. Wage and Separation Mailing
      3. Any View Only Roles Account Maintenance, Update and Submit

Important to Note

• For additional assistance, a TPA Authorization User Guide is available.
• Homebase uses a payroll partner, Check for backend payroll processing.