Mo. Rev. Stat. § 14.070: Venue of actions for federal taxes or penalties.

Suits for the collection of the United States internal revenue, or for penalties for violating any of the provisions of an act of the Congress of the United States, entitled "An act to provide internal revenue to support the government and to pay the interest on the public debt" (or any amendments which may have been or may be made to said act) may be brought in the several courts of this state, in like manner and effect as suits under the laws of this state.