State Tax Updates April 2026: OBBBA Conformity, PTET, R&D Credits
What are the most important state tax updates April 2026? Multiple states moved on OBBBA conformity (Oregon, Maine, Kentucky, New Mexico), Maine created a new PTET and 2% high-income surcharge, Wisconsin extended R&D credit carryforwards to 50 years, Kentucky added a 14.25% prediction-market excise, and Washington’s new 9.9% personal income tax on income over $1M…