The Washington Court of Appeals has held that a statutory amendment barring the filing of 24 years of business and occupation (B&O) tax refund claims violates a taxpayer’s due process rights and is therefore unconstitutional. Tesoro Refining & Mktg. Co., No. 39417-1-II (Wash. Ct. App. Dec. 21, 2010). Tesoro Refining and Marketing Company (Tesoro), a Delaware corporation, operates an oil refinery in Washington. Tesoro manufactures and sells bunker fuel (a residual fuel oil that remains after gasoline and distillate fuel are extracted from crude oil) primarily to vessels engaged in foreign commerce for consumption outside the territorial waters of the United States. 

Prior to 2009, Washington law permitted a company that manufactured and sold a qualifying fuel (such as bunker fuel) to deduct amounts derived from the sale of the fuel against its manufacturing B&O tax liability. Tesoro did not take the deduction on its originally filed tax returns and later filed a refund claim for B&O taxes paid on bunker fuel manufactured and sold from 1999 to 2004. The Department of Revenue denied the refund claim after finding that the deduction applied only to the wholesaler and retailer B&O tax and not to the manufacturer B&O tax. Tesoro appealed the Department’s determination to the superior court. While the case was pending, in 2009, the Washington legislature amended the B&O tax deduction statute limiting the applicability of the B&O tax deduction to retailers and wholesalers of qualifying fuels prospectively and retroactively. The superior court held that Tesoro was not entitled to the deduction and granted summary judgment to the Department. Tesoro appealed the superior court’s decision.Continue Reading Washington Court of Appeals Holds Retroactive Application of a Statute Unconstitutional