Modifies provisions relating to the Missouri working family tax credit act and makes the tax credit refundable

Missouri's HB 1479 modifies the state's Working Family Tax Credit Act to make the credit refundable for tax years beginning January 1, 2026, and later. It allows eligible Missouri residents - those claiming the federal Earned Income Tax Credit (EITC) as single, head of household, widowed, or married filing jointly - to claim a state credit equal to 10-20% of their federal EITC amount, reducing their state tax liability. The credit becomes refundable after 2025 (meaning excess credit is paid as a refund), but the maximum 20% rate requires Missouri's net general revenue to exceed prior years' levels by at least $150 million. The bill also mandates annual reporting on credit usage and requires the state tax department to proactively notify eligible taxpayers who may qualify for the credit.