New Company Registration for Missouri

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 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.

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

Tax Agency: Missouri Department of Revenue

Creating a Combined Registration for State withholding and Unemployment Income Tax

1. Go to the Missouri Department of Revenue - My Tax Portal
2. Click Start Registration Here
3. Agree to terms and conditions
4. Complete application

Important to Note

• Update your Homebase account with your Withholding State ID and your Unemployment Employer Account Number. Your account numbers are required for all Missouri interactions to ensure your accounts are accurate.

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State Withholding Income Tax

Tax Agency: Missouri Department of Revenue

Creating an Online Account

1. Go to MyTax Missouri
2. Select Create An Account
3. Select Administrator for my individual or business account
4. Agree to terms
5. Create User Profile
6. Select yes to acknowledge you are authorized to register
7. Confirmation will populate and you will receive a confirmation email on how to log on and access your account
8. The email will include a temporary password and prompted to change password on your initial log in
9. Add security questions and answers
10. You will receive an email once password is successfully changed
11. Go back to MyTax Missouri to assign your business account to your online account with user ID and permanent password
12. Select “manage accounts”
13. Select “I would like to give access to MyTax Account, using information from my business tax account”
14. Enter business account information
15. Select yes to acknowledge you are authorized to make changes
16. Tax Agency
17. Missouri Department of Labor & Industrial Relations
18. Type of Tax
19. State Unemployment Income Tax (UI)
20. Create a username and password
21. Go to UINTERACT
22. New Account Registration
23. I am an employer and have a DES Employer Account Number
24. Complete employer signup

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Local Income Tax

Tax Agency: City of Kansas City Missouri

Registering for Local Earned Income Tax

1. Go to Kansas City Quick Tax website
2. Under Businesses and individuals select Register Here
3. Enter ID information
4. Select yes to sign up for quick tax and to register new accounts
5. Under Who are you signing up, Select “my business” and complete remaining steps

Providing Check with a Kansas City Letter ID

In order for Check to file and pay your City of Kansas City Earnings Tax on your behalf, you will need to provide Check with your Letter ID. You can find it on the top-right corner of letters that you have received from the City of Kansas City, Finance Department within the last year.

1. Sign into Quick Tax website
2. You can find it by clicking the "Letter" tab.

Important to Note

• If you have any questions regarding this process, please contact the City of Kansas City, MO quick tax system at 816-513-1120 or email revenue@kcmo.org
• For additional assistance, Quick Tax Tutorials are available

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Local Earning Tax

Tax Agency: City of St. Louis Missouri

All businesses located in the City of St. Louis, except those exempted by law, are required to pay the Earnings Tax.

Non-resident businesses, except those exempted by law, who perform work, services or business activity in the City of St. Louis are required to pay the Earnings Tax.

All City of St. Louis residents are required to pay the Earnings Tax regardless of where
they work. Non-residents are required to pay the Earnings Tax on work or services performed within the City of St. Louis.

There is no legal requirement to withhold on City of St. Louis residents if there is no business activity taking place in the City of St. Louis. If the business chooses not to withhold there is a legal requirement that it must report to our office all city residents. The business will need to be set up as an agency for reporting purposes only.

1. Complete Form E-9: - APPLICATION FOR EARNINGS TAX ACCOUNT
2. Fax completed forms to St. Louis Collector of Revenue, (314) 622-4847 or email: EarningsTaxCOR@stlouis-mo.gov

Important to Note

• For further assistance or additional questions, you may contact the City St. Louis office at (314) 622-4805. And additional FAQs are available.

*Note: Homebase uses a payroll partner, Check for backend payroll processing.