Transportation: motor fuel tax; incentives for the sale and production of biodiesel; provide for. Amends 1967 PA 281 (MCL 206.1 - 206.847) by adding sec. 679.

HB 4721 creates tax credits for biodiesel sales and production in Michigan, effective 2025-2030. Retail fuel dealers receive credits of $0.02-$0.07 per gallon for selling biodiesel blends (6-9%, 10-19%, or 20%+), while biodiesel producers get $0.02 per gallon. Total credits are capped at $16 million annually for retailers and $2 million for producers, with excess claims distributed proportionally. The bill directly affects Michigan fuel retailers and biodiesel producers by reducing their income tax liability based on specific blend volumes sold or produced.