Order of the Court (Sixth Chamber) of 3 March 2021.#FGSZ Földgázszállító Zrt. v Nemzeti Adó- és Vámhivatal Fellebbviteli Igazgatósága.#Request for a preliminary ruling from the Pécsi Törvényszék.#Reference for a preliminary ruling – Common system of value added tax (VAT) – Directive 2006/112/EC – Article 90 – Reduction of the taxable amount – Total or partial non-payment of the price – Debt which has become definitively irrecoverable – Limitation period regarding applications for a subsequent reduction in the taxable amount of VAT – Date on which time starts to run.#Case C-507/20.