Mississippi
Last Updated June 17, 2026.
Mississippi employers are required to manage state withholding taxes and unemployment insurance obligations. Use the links below to find payroll resources, forms, and agency contacts.
State Tax Guidelines
Mississippi Department of Revenue – Withholding Tax
Agency Information
Add to existing company setup
Submit a request to your service team to add MS (withholding) to your company setup. Please include the below with your request:
- Withholding – Withholding account number and Deposit Frequency. If you’re unsure of your deposit frequency or account number you can call the agency at 601-923-7088.
- Power of Attorney- POA is required, please obtain the prefilled form from your client service representative.
Register a new company
Employers can register online at https://tap.dor.ms.gov/_/#1. Select Register at the top of the page then select New Taxpayer. Once completed you will receive your account number and deposit frequency.
Power of Attorney
Mississippi Department of Employment Security – Unemployment tax
Agency Information
Add to existing company setup
Submit a request to your service team to add MSSUI (unemployment) to your company setup. Please include the below with your request:
- Unemployment – Account Number and Tax rate. This can be found on a Tax Rate Notice or the Quarterly contribution report. If you’re unsure of your tax rate or account number, you can call the agency at 601-321-6000.
- Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
Register a new company
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