Judgment of the Court (Seventh Chamber) of 8 June 2023.#E. v Dyrektor Izby Administracji Skarbowej we Wrocławiu.#Request for a preliminary ruling from the Naczelny Sąd Administracyjny.#Reference for a preliminary ruling – Principle of sincere cooperation – Principle of effectiveness – Tax levied by a Member State in breach of EU law – Breach established following a ruling of the Court of Justice – Right to be paid interest on the overpayment – National legislation limiting the right to the payment of interest to the period running until the thirtieth day following the publication of the ruling of the Court of Justice in the Official Journal of the European Union.#Case C-322/22.