Mo. Rev. Stat. § 137.265
Current with changes from the 2023 Legislative Session
An assessment of property or charges for taxes thereon shall not be considered illegal on account of any informality in making the assessment, or in the tax lists, or on account of the assessment not being made or completed within the time required by law.
§ 137.265, RSMo
RSMo 1939 § 10980, A.L. 1945 p. 1782 § 21