Revenue and taxation; income tax; earned income tax credit; effective date.

HB 2229 increases Oklahoma's earned income tax credit (EITC) from 5% to 10% of the federal credit amount for qualifying residents. It directly affects low-to-moderate income individuals and families who claim the federal EITC, expanding their state tax benefit. The bill makes the credit refundable if it exceeds state tax liability and prorates the maximum credit based on Oklahoma adjusted gross income relative to federal income. Effective January 1, 2026, this change aligns Oklahoma's EITC percentage with the federal credit structure while maintaining the state's refundability provision.