“24. Input tax and output tax. (1) Subject to the following provisions of this section, “input tax”, in relation to a taxable person, means the following tax, that is to say— (a) VAT on the supply to him of any goods or services; (b) VAT on the acquisition by him from another member State of any goods; and (c) VAT paid or payable by him on the importation of any goods from a place outside the member States, being (in each case) goods or services used or to be used for the purpose of any business carried on or to be carried on by him. (2) Subject to the following provisions of this section, “output tax”, in relation to a taxable person, means VAT on supplies which he makes or on the acquisition by him from another member State of goods (including VAT which is also to be counted as input tax by virtue of subsection (1)(b) above). … 25. Payment by reference to accounting periods and credit for input tax against output tax. (1) A taxable person shall— (a) in respect of supplies made by him, and (b) in respect of the acquisition by him from other member States of any goods, account for and pay VAT by reference to such periods (in this Act referred to as “prescribed accounting periods”) at such time and in such manner as may be determined by or under regulations and regulations may make different provision for different circumstances. (2) Subject to the provisions of this section, he is entitled at the end of each prescribed accounting period to credit for so much of his input tax as is allowable under section 26, and then to deduct that amount from any output tax that is due from him. (3) If either no output tax is due at the end of the period, or the amount of the credit exceeds that of the output tax then, subject to subsections (4) and (5) below, the amount of the credit or, as the case may be, the amount of the excess shall be paid to the taxable person by the Commissioners; and an amount which is due under this subsection is referred to in this Act as a “VAT credit”. … 26. Input tax allowable under section 25. (1) The amount of input tax for which a taxable person is entitled to credit at the end of any period shall be so much of the input tax for the period (that is input tax on supplies, acquisitions and importations in the period) as is allowable by or under regulations as being attributable to supplies within subsection (2) below.
“(1) Where a person has … paid an amount to the Commissioners by way of VAT which was not VAT due to them, they shall be liable to repay the amount to him.”
“59. The purpose of section 81 (3A) is, in my judgment, clear. It is that where a taxpayer makes a claim for repayment of VAT which has been paid owing to a mistake, all the consequences of the mistake are to be taken into account in assessing the quantum of his claim. That purpose is consistent with the overarching scheme of VAT under the Sixth Directive which treats the payment of output tax and the deduction of input tax as an “inseparable whole”
“90. There is a well-established principle of EU law that a member state is in principle required to repay taxes levied in breach of EU law, and an equally well-established exception whereby repayment can be refused where it would entail unjust enrichment of the taxable person because the burden of the tax has been passed on: see San Giorgio, paras 12-13. In the latter situation, however, the Court of Justice has held that the person to whom the tax was passed on should have a right to recover the sums unduly paid, so as to offset the consequences of the tax’s incompatibility with EU law by neutralising the economic burden which the tax has imposed on the operator who has actually borne it: Danfoss A/S v Skatteministeriet (Case C94/10)[2011] ECR I-9963 , paras 23 and 25. It is for the domestic legal system of each member state to lay down the conditions under which claims may be made, subject to observance of the principles of equivalence and effectiveness: Danfoss, para 24. These general principles apply to the reimbursement of improperly invoiced VAT: Reemtsma Cigarettenfabriken GmbH v Ministero delle Finanze (Case C35/05)[2007] ECR I-2425 . Reasonable limitation periods are compatible with the principle of effectiveness, and the limitation period applicable to claims under section 80 of the 1994 Act has specifically been held to be reasonable: Marks & Spencer plc v Customs and Excise Comrs (Case C-62/00 )[2003] QB 866 , para 35.”[2003] QB 866 , para 35.”