New Company Registration for Michigan

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.

---

Register for Taxes with Middesk

Homebase has partnered with Middesk to make tax registration easier for you.

• Middesk can register you across all 50 states for withholdings/income tax (SIT) and unemployment insurance (SUI)
• Middesk will continue to support your ongoing compliance by processing and surfacing your state mail for your review
• Middesk offers registrations for select PFMLs and local jurisdictions as well

To get started, sign up here and check out this tutorial.

---

State Withholding Income Tax & State Unemployment Income Tax (SUI)

Tax Agency: Michigan Department of Revenue

Creating an Online Account for the Michigan Department of Treasury

1. Go to the Michigan Treasury Online
2. Select Create My User Profile
3. Create User Profile
4. Create a username and password and security questions and answers
5. Confirmation will populate and you will receive a confirmation email

Registering for a Combined Treasury Account Number and Unemployment Insurance Agency Number

1. Go to the Michigan Treasury Online
2. Click on “Log in to your account”
3. You will now be in the (MTO) homepage
4. Under Tax Services, select Start a New Business (E-Registration)
5. You will now be in MiWAM Employer Registration
6. Select Start eRegistration
7. Complete 12 step questionnaire
8. Certify and submit
9. Save and print copy of confirmation number and application
10. Your application is recognized on the Treasury's system within 15 minutes.

Connecting Your MTO Account to Your Business Account

1. Return to MTO and start interacting with Treasury
2. Enter username and password and log in
3. Under Tax Services, select “Manage Business Registration”
4. Select create a new relationship
5. Enter Treasury Number
6. Select all applicable taxes you are responsible for
7. Complete security questions
8. Retrieve emailed access code and copy and paste code into MTO and submit
9. You will be directed back to dashboard showing the connected account

---

State Unemployment Income Tax (SUI)

Tax Agency: Michigan Department of Labor and Economic Opportunity

Creating an Online Account for the Michigan Department of Labor and Economic Opportunity

1. Go to Michigan Department of Labor and Economic Opportunity
2. Under I am and Employer, select “Login to MiWAM”
3. Select Sign Up for an Employer/ Service Provider MiWAM Account
4. Click Employer
5. Complete account information

How to authorize Homebase:

• On the Employer Homepage, in the Associated TPA(s) header, select TPA Authorization.
• On the Third Party Administrator (TPA) Authorization screen, select New.
• On the Assign Third Party Administrator (TPA) screen, enter the TPA ID of the TPA you wish to associate with the employer.
  • TPA ID = 50000438
• On the Third Party Administrator (TPA) Information screen, enter the TPA services begin date and TPA services end date (if desired).
  • Note: For Q1 2026, enter January 1, 2026 as the start date.
• In the Unassigned Roles section, select the checkbox for any roles you wish to assign to the TPA. This will determine the access the TPA has to information on the employer account.
  • Account Maintenance View Only
  • Tax Payment Update and Submit
  • Wage Detail Update and Submit
  • Edit Rate Notice and Voluntary Contribution
• Select Save to move the roles from the Unassigned Roles section to the Assigned Roles section.

Important to Note

• Update your Homebase account with your Treasury Number and your Unemployment account number. Your account numbers are required for all Michigan interactions to ensure your accounts are accurate
  • Note: Go to Settings > click Payroll > click Taxes.
• If you have any questions regarding this process, please contact the Department of Treasury at 517-636-6925.
• For additional assistance, Michigan Treasury tutorials are available.