MO SB1521

Requires county assessors to notify property owners of increased valuations on or before June 15th, including the previous assessed value and information about appeal processes and deadlines

Mandates that during general reassessment years, counties must provide property owners with a projected tax liability notice alongside the assessment increase notification

Projected tax liability notices must include: owner information, list of all taxing political subdivisions, projected and previous tax rates for each levy, tax rate ceilings, and contact information for each taxing entity

Requires assessors to disclose on their website the specific assessment method, basis of value computation, and any third-party documents or data relied upon in calculating assessed value

Applies to counties with charter forms of government immediately, with other counties phased in after the State Tax Commission provides necessary implementation software