Judgment_paragraph 37 · Mahagében Kft v Nemzeti Adó- és Vámhivatal Dél-dunántúli Regionális Adó Főigazgatósága and Péter Dávid v Nemzeti Adó- és Vámhivatal Észak-alföldi Regionális Adó Főigazgatósága (C-80/11, C-142/11)

37In order to reply to those questions, it must first be borne in mind that, according to settled case-law, the right of taxable persons to deduct the VAT due or already paid on goods purchased and services received as inputs from the VAT which they are liable to pay is a fundamental principle of the common system of VAT established by the relevant European Union legislation (see, inter alia, Case C-78/00 Commission v Italy [2001] ECR I-8195, paragraph 28; Case C-25/07 Sosnowska [2008] ECR I-5129, paragraph 14; and Case C-274/10 Commission v Hungary [2011] ECR I-7289, paragraph 42).