Establishes the "Missouri Business Tax Adjustment Act", adjusting the income tax rates applied to the Missouri taxable income of certain business entities based on annual net revenue, upon voter approval

HB 814, titled the "Missouri Business Tax Adjustment Act," creates a new tiered income tax system for Missouri business entities based on annual net revenue. It directly affects corporations, LLCs, partnerships, and other business taxpayers operating in Missouri, replacing previous tax rates with the following tiers: 7% for businesses with $10M+ net revenue, 5% for $1M-$10M, 3.5% for $500k-$1M, and existing rates for small businesses under $500k. The bill establishes a dedicated "Missouri Business Tax Fund" to hold revenue collected under this new system. This change takes effect for tax years beginning after the bill's passage and adoption.