Mo. Rev. Stat. § 143.771: Additions treated as tax.

The additions to tax and penalties provided by sections 143.011 to 143.996 shall be paid upon notice and demand and shall be assessed, collected, and paid in the same manner as taxes and any reference in sections 143.011 to 143.996 to income tax or the tax imposed by sections 143.011 to 143.996 shall be deemed also to refer to additions to the tax, and penalties provided by this section. For purposes of the deficiency procedures provided in section 143.611, this subsection shall not apply to:

(1) Any addition to tax under subsection 1 of section 143.741 except as to that portion attributable to a deficiency;

(2) Any addition to tax for failure to pay estimated tax as provided in section 143.761;

(3) Any additional penalty under subsection 5 of section 143.751.