Within 20 days of hiring a new employee, send a copy of Form MO W-4 to the Missouri Department of Revenue, P.O. Box 3340, Jefferson City, MO 65105-3340 or fax to (573) 526-8079.
Please visit http://dss.mo.gov/child-support/employers/new-hire-reporting.htm for additional information regarding new hire reporting.
Visit our online withholding calculator https://mytax.mo.gov/rptp/portal/home/withholding-calculator.
- Employees must complete a new form if their filing status changes or to adjust the amount of withholding.
- If you are claiming an “Exempt” status due to the Military Spouses Residency Relief Act you must provide one of the following to your employer: Leave and Earnings Statement of the non-resident military servicemember, Form W-2 issued to the nonresident military servicemember, a military identification card, or specific military orders received by the servicemember. You must also provide verification of residency such as a copy of your state income tax return filed in your state of residence, a property tax receipt from the state of residence, a current drivers license, vehicle registration or voter ID card.
- Additional information can be found at https://dor.mo.gov/business/.
Mail to: Taxation Division P.O. Box 3340
Phone: (573) 751-8750 Fax: (573) 526-8079