The IRS is temporarily waiving the penalty for using dyed fuel on Florida highways. It took the step to minimize and prevent disruptions to the supply of fuel for diesel-powered highway vehicles because of Hurricane Dorian. The relief is available only if the vehicle operator, or the person selling the fuel, pays the tax of 24.4 cents per gallon that’s normally applied to diesel fuel for highway use. Ordinarily, dyed diesel fuel isn’t taxed, because it’s sold for uses exempt from excise tax, such as farming, heating homes and fueling municipal buses. Relief from the penalty in Florida is immediate and will remain in effect through Sept. 15.