Mo. Rev. Stat. § 143.691
Current with changes from the 2024 Legislative Session
The taxpayer at any time, whether or not a notice of deficiency has been issued, shall have the right to waive the restrictions on assessment and collection of the whole or any part of the deficiency. This waiver may only be made by a signed notice that refers to the right to file a protest and is filed with the director of revenue.
§ 143.691, RSMo
Effective 1/1/1973