Judgment of the Court (Grand Chamber) of 3 March 2020.#Vodafone Magyarország Mobil Távközlési Zrt. v Nemzeti Adó- és Vámhivatal Fellebbviteli Igazgatósága.#Request for a preliminary ruling from the Fővárosi Közigazgatási és Munkaügyi Bíróság.#Reference for a preliminary ruling — Freedom of establishment — Tax on the turnover of telecommunications operators — Progressive tax having a greater impact on undertakings owned by natural or legal persons of other Member States than on national undertakings — Progressive tax bands applicable to all taxable persons — Neutrality of the amount of turnover as a criterion of differentiation — Ability to pay of taxable persons — State aid — Common system of value added tax (VAT) — Turnover taxes