Mo. Rev. Stat. § 143.401: General treatment of partners and partnerships.

A partnership shall not be subject to tax under sections 143.011 to 143.996. Persons carrying on business as partners shall be liable for the tax under sections 143.011 to 143.996 only in their separate capacities. The provisions of the Internal Revenue Code relating to partners and partnerships shall apply in determining Missouri taxable income of each partner except, however, for the modifications provided in sections 143.411 and 143.421.