Revenue and taxation; ad valorem taxation; ad valorem tax bills; effective date.

HB 3434 requires Oklahoma county treasurers to send property taxpayers detailed, standardized statements about their ad valorem (property) taxes. These statements must explain how taxes are calculated, including the property's fair market value, assessment percentages, millage rates, and how taxes are divided between county, school, and other jurisdictions. The bill mandates clear, plain-language explanations so taxpayers can understand their bills, replacing complex jargon with accessible examples. It applies to all Oklahoma property owners and takes effect November 1, 2026.