Opinion of Advocate General Tanchev delivered on 9 September 2021.#Grundstücksgemeinschaft Kollaustraße 136 v Finanzamt Hamburg-Oberalster.#Request for a preliminary ruling from the Finanzgericht Hamburg.#Reference for a preliminary ruling – Taxation – Value added tax (VAT) – Directive 2006/112/EC – Point (b) of the first paragraph of Article 66 – Chargeability of VAT – The time the payment is received – Article 167 – Origin and scope of the right of input VAT deduction – Article 167a – Derogation – Cash accounting Letting and subletting of a property used for industrial or commercial purposes.#Case C-9/20.