Opinion of Advocate General Kokott delivered on 12 September 2019.#Google Ireland Limited v Nemzeti Adó- és Vámhivatal Kiemelt Adó- és Vámigazgatósága.#Request for a preliminary ruling from the Fővárosi Közigazgatási és Munkaügyi Bíróság.#Reference for a preliminary ruling — Freedom to provide services — Article 56 TFEU — Restrictions — Tax provisions — Tax on advertising activities based on turnover — Obligations relating to registration with a tax authority — Principle of non-discrimination — Fines — Principle of proportionality.#Case C-482/18.