To amend the Internal Revenue Code of 1986 to provide refunds with respect to certain dyed fuels that are exempt from tax and with respect to which tax was previously paid.

HR 2146 creates a refund process for businesses that paid tax on certain dyed diesel fuel or kerosene later determined to be exempt from tax under the Internal Revenue Code. Specifically, it allows businesses to receive a refund equal to tax paid under Section 4081 for "eligible indelibly dyed" fuels that are exempt under Section 4082(a). The bill amends tax code provisions to treat these refunds like standard tax credits, requiring the IRS to process them without interest. This applies to fuel removed from terminals 180 days after the bill’s enactment. It directly affects fuel distributors and retailers who previously paid tax on exempt dyed fuels.