CELEX:62020CJ0538: Judgment of the Court (Fourth Chamber) of 22 September 2022.#Finanzamt B v W AG.#Reference for a preliminary ruling – Freedom of establishment – Articles 49 and 54 TFEU – Deduction of final losses incurred by a non-resident permanent establishment – State which has waived its power to impose taxes under a double taxation convention – Comparability of situations.#Case C-538/20.