“S24(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; 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.”
“Regulations may provide:- (a) for VAT on the supply of goods or services to a taxable person ... to be treated as his input tax only if and to the extent that the charge for VAT is evidenced and quantified by reference to such documents (or other information) as may be specified in the regulations or the Commissioners may direct either generally or in particular cases or classes of cases.”
“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 as is due from him.”
“The amount of input tax 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; (2)(a) taxable supplies:”
“At the time of claiming deduction of input tax in accordance with paragraph (1) above, a person shall, if the claim is in respect of – (a) supply from another taxable person, hold the document which is required to be provided under regulation 13: (b) to (f) ... provided that where the Commissioners so direct, either generally or in relation to particular cases or classes of cases, a claimant shall hold (or provide) such other evidence of the charge to VAT as the Commissioners may direct.”
“6. If you are a taxable person, in order to exercise your basic right to deduct input tax, you must hold a valid VAT invoice . Without a valid VAT invoice, there is no right to deduct input tax. However, in the absence of such an invoice, you may still be able to make claims for input tax, but these claims are subject to HMRC’s discretion. This of course assumes that a taxable supply has taken place. Where HMRC question the fact that an underlying supply has taken place, these provisions do not apply.”