** NOTICE **

The online credit inquiry system is no longer available for sales, use and employer withholding. The Department will implement a new portal service called MyTax Missouri, which will be available 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 after September 6, 2017, 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
P.O. Box 3350
Jefferson City, MO 65105-3350
Telephone: (573) 526-9938
Fax: (573) 751-9409
E-mail: salesrefund@dor.mo.gov

For withholding tax overpayment assistance, contact

Missouri Department of Revenue
P.O. Box 3375
Jefferson City, MO 65105-3375
Telephone: (573) 751-3505
Fax: (573) 522-6816
E-mail: withholding@dor.mo.gov