Case C-247/21: Judgment of the Court (Eighth Chamber) of 8 December 2022 (request for a preliminary ruling from the Verwaltungsgerichtshof — Austria) — Luxury Trust Automobil GmbH v Finanzamt Österreich (Reference for a preliminary ruling — Value added tax (VAT) — Directive 2006/112/EC — Article 42(a) — Article 197(1)(c) — Article 226(11a) — Article 141 — Exemption — Triangular transaction — Designation of the final recipient of a supply as being liable for VAT — Invoicing — Reference to ‘Reverse charge’ — Mandatory — Omission of that reference on an invoice — Retroactive correction of the invoice)