Amazon can finally close the book on a long-running state aid saga in the European Union. The Commission confirmed Thursday it’s shuttered an investigation into whether Luxembourg, the Member State where Amazon has its EU HQ, had granted it “selective tax advantages.” The upshot is Amazon has no unpaid taxes to pay. The case dates back almost a decade at this point. A major development came in 2017 when the Commission concluded Luxembourg had given Amazon illegal tax benefits worth €250 million....