Incorporating in Missouri is relatively easy.  This article should give you resources to understand how the incorporation process works in Missouri, and to use the legal forms from the Missouri Secretary of State to incorporate in Missouri.

Though not required, it is advised that you check your corporate name for availability before filing any applications. To do this you can conduct a name search at the Missouri Secretary of State Web site: https://www.sos.mo.gov/BusinessEntity/soskb/csearch.asp. If your name is available, you can fill out form BE-1 (11/2008)  Application for Reservation of Name. The fee to reserve your name is $25 for a 60-day period.

Once your company name is established, you can begin filling out your Form Corp. 41 (11/2008), Articles of Incorporation. The filing fee is $58 if no more than 30,000 shares are issued, and the value does not exceed $30,000. Anything beyond that requires an adjusted fee based on additional shares. Information is available on the first page of the Articles of Incorporation packet. Fees and form can be mailed to: State of Missouri, Robin Carnahan, Secretary of State, Corporations Division, P.O. Box 778 / 600 W. Main St., Rm. 322, Jefferson City, MO 65102.

Corporations are required to file an Annual Report. Annual reports can be filed online or via mail. To file online visit https://www.sos.mo.gov/BusinessEntity/annualreport/reportstart.asp and follow the easy steps to complete your report. To print your annual report for filing you must visit https://www.sos.mo.gov/BusinessEntity/soskb/csearch.asp and locate your company. From there, follow the prompts provided and a report can be printed out.

There are many companies that offer the service of filing these articles on your behalf, such as FileOnline  or LegalZoom.