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

HB 1478 modifies Missouri's Working Family Tax Credit Act to make the state tax credit refundable starting in 2026. The bill provides eligible Missouri residents - those who qualify for the federal Earned Income Tax Credit (EITC) and file as single, head of household, widowed, or married filing jointly - with a state credit equal to 10% to 20% of their federal EITC amount (capped at 20%). The credit becomes refundable after 2025, meaning excess credit value will be paid as cash refunds instead of being lost. The Missouri Department of Revenue must proactively notify eligible taxpayers who didn’t claim the credit and report annual usage statistics.