State Statute 137.280 RSMo., requires each taxpayer to turn in a listing of their personal property, as of January 1, to the assessor between January 1 - March 1. Failure to submit a listing by March 1 can result in a late assessment penalty up to $100.
This statute only allows for six reasons the Assessor can defer the penalty:
The taxpayer is in the military service and is outside the state
The taxpayer filed timely, but in the wrong county
There was a loss of records due to fire / flood
The taxpayer can show the list was mailed timely as evidenced by the postmark
The Assessor determines that no form for listing was mailed to the taxpayer for that year
That neglect occurred as a direct result of the actions or inactions of the county