** NOTICE **

The online credit inquiry system is no longer available for sales, use and employer withholding. The Department implemented a new portal service called MyTax Missouri, on September 6, 2017 at https://mytax.mo.gov. The new service will allow you to register a portal account to file and track Sales, Use, and Employer Withholding Tax, and Tire and Lead-Acid Battery Fee returns and payments and has many more features. The new service will allow you to view your available overpayment information. Please check the website for information on how to access your account overpayment information through this new service.

For sales/use tax overpayment assistance, contact

Missouri Department of Revenue
PO Box 3350
Jefferson City, MO 65105-3350
Fax: 573-751-9409
Email: salesrefund@dor.mo.gov

For withholding tax overpayment assistance, contact

Missouri Department of Revenue
PO Box 3375
Jefferson City, MO 65105-3375
Telephone: 573-751-3505
Fax: 573-522-6816
Email: withholding@dor.mo.gov