Missouri Department of Revenue2018 Missouri Return Inquiry System
The Missouri Department of Revenue will soon replace the Return Inquiry System. The Department must temporarily close the program on November 7, 2018 at 5:00 PM CST. Please check the website after January 1, 2019 for the program's availability. You may also contact the Department to inquire about your refund at 573-751-3505 or by e-mail at income@dor.mo.gov. Please accept our apologies for any inconvenience.