“12B Records to be kept for purposes of returns (1) Any person who may be required by a notice under section 8, 8A … or 12AA of this Act … to make and deliver a return for a year of assessment or other period shall - (a) keep all such records as may be requisite for the purpose of enabling him to make and deliver a correct and complete return for the year or period; and (b) preserve those records until the end of the relevant day, that is to say, the day mentioned in subsection (2) below or, where a return is required by a notice given on or before that day, whichever of that day and the following is the latest, namely (i) where enquiries into the return are made by an officer of the Board, the day on which, by virtue of section 28A(1B) or 28B(1B) of this Act, those enquiries are completed; and (ii) where no enquiries into the return are so made, the day on which such an officer no longer has power to make such enquiries. (2) The day referred to in subsection (1) above is - (a) in the case of a person carrying on a trade, profession or business alone or in partnership or a company, the fifth anniversary of the 31st January next following the year of assessment or (as the case may be) the sixth anniversary of the end of the period; (b) otherwise, the first anniversary of the 31st January next following the year of assessment … or (in either case) such earlier day as may be specified in writing by the Commissioners for Her Majesty's Revenue and Customs (and different days may be specified for different cases).”
“ 28A Completion of enquiry into personal or trustee return … (1) This section applies in relation to an enquiry under section 9A(1) … of this Act. (1A) Any matter to which the enquiry relates is completed when an officer of Revenue and Customs informs the taxpayer by notice (a “partial closure notice”) that the officer has completed his enquiries into that matter. (1B) The enquiry is completed when an officer of Revenue and Customs informs the taxpayer by notice (a “final closure notice”) - (a) in a case where no partial closure notice has been given, that the officer has completed his enquiries, or (b) in a case where one or more partial closure notices have been given, that the officer has completed his remaining enquiries. In this section “the taxpayer” means the person to whom notice of enquiry was given.”
"(6) If, on an appeal notified to the tribunal, the tribunal decides (a) that, the appellant is overcharged by a self-assessment; (b) …; or (c) that the appellant is overcharged by an assessment other than a self-assessment, the assessment or amounts shall be reduced accordingly, but otherwise the assessment or statement shall stand good. (7) If, on an appeal notified to the tribunal, the tribunal decides (a) that the appellant is undercharged to tax by a self-assessment (b) …; or (c) that the appellant is undercharged by an assessment other than a self-assessment, the assessment or amounts shall be increased accordingly. (8) Where, on an appeal notified to the tribunal against an assessment (other than a self-assessment) which (a) assesses an amount which is chargeable to tax, and (b) charges tax on the amount assessed, the tribunal decides as mentioned in subsection (6) or (7) above, the tribunal may, unless the circumstances of the case otherwise require, reduce or, as the case may be, increase only the amount assessed; and where any appeal notified to the tribunal is so determined the tax charged by the assessment shall be taken to have been reduced or increased accordingly."
“1 (1) A penalty is payable by a person (P) where - (a) P gives HMRC a document of a kind listed in the Table below, and (b) Conditions 1 and 2 are satisfied. (2) Condition 1 is that the document contains an inaccuracy which amounts to, or leads to - (a) an understatement of a liability to tax, (b) a false or inflated statement of a loss, or (c) a false or inflated claim to repayment of tax. (3) Condition 2 is that the inaccuracy was careless (within the meaning of paragraph 3) or deliberate on P’s part. … 3 (1) For the purposes of a penalty under paragraph 1, inaccuracy in a document given by P to HMRC is - (a) “careless” if the inaccuracy is due to failure by P to take reasonable care, (b) “deliberate but not concealed” if the inaccuracy is deliberate on P’s part but P does not make arrangements to conceal it… 4 (1) This paragraph sets out the penalty payable under paragraph 1. (2) if the inaccuracy is in category 1, the penalty is - (a) for careless action, 30% of the potential lost revenue, (b) for deliberate but not concealed action, 70% of the potential lost revenue, and (c) for deliberate and concealed action, 100% of the potential lost revenue… 5 (1) “The potential lost revenue” in respect of an inaccuracy in a document (including an inaccuracy attributable to a supply of false information or withholding of information) or a failure to notify an under-assessment is the additional amount due or payable in respect of tax as a result of correcting the inaccuracy or assessment… 9 (A1) Paragraph 10 provides for reductions in penalties - (a) under paragraph 1 where a person discloses an inaccuracy that involves a domestic matter, … (1) A person discloses an inaccuracy, a supply of false information or withholding of information, or a failure to disclose an under-assessment by - (a) telling HMRC about it, (b) giving HMRC reasonable help in quantifying the inaccuracy, the inaccuracy attributable to the supply of false information or withholding of information, or the under-assessment, and (c) allowing HMRC access to records for the purpose of ensuring that the inaccuracy, the inaccuracy attributable to the supply of false information or withholding of information, or the under-assessment is fully corrected… (2) Disclosure - (a) is “unprompted” if made at a time when the person making it has no reason to believe that HMRC have discovered or are about to discover the inaccuracy, the supply of false information or withholding of information, or the under-assessment, and (b) otherwise, is “prompted”. (3) In relation to disclosure “quality” includes timing, nature and extent. 10 (1) If a person who would otherwise be liable to a penalty of a percentage shown in column 1 of the Table (a “standard percentage”) has made a disclosure, HMRC must reduce the standard percentage to one that reflects the quality of the disclosure. (2) But the standard percentage may not be reduced to a percentage that is below the minimum shown for it - (a) in the case of a prompted disclosure, in column 2 of the Table, and (b) in the case of an unprompted disclosure, in column 3 of the Table. Standard % Minimum % for prompted disclosure Minimum % for unprompted disclosure 30% 15% 0% 70% 35% 20% 100% 50% 30% 11 (1) If they think it right because of special circumstances, HMRC may reduce a penalty under paragraph 1, 1A or 2. (2) In sub-paragraph (1) "special circumstances” does not include - (a) ability to pay, or (b) the fact that a potential loss of revenue from one taxpayer is balanced by a potential over-payment by another. (3) In sub-paragraph (1) the reference to reducing a penalty includes a reference to - (a) staying a penalty, and (b) agreeing a compromise in relation to proceedings for a penalty. … 13 … (3) An assessment of a penalty under paragraph 1 or 1A must be made before the end of the period of 12 months beginning with - (a) the end of the appeal period for the decision correcting the inaccuracy, or (b) if there is no assessment to the tax concerned within paragraph (a), the date on which the inaccuracy is corrected. (4) An assessment of a penalty under paragraph 2 must be made before the end of the period of 12 months beginning with - (a) the end of the appeal period for the assessment of tax which corrected the understatement, or (b) if there is no assessment within paragraph (a), the date on which the understatement is corrected. (5) For the purpose of sub-paragraphs (3) and (4) a reference to an appeal period is a reference to the period during which - (a) an appeal could be brought, or (b) an appeal that has been brought has not been determined or withdrawn. (6) Subject to sub-paragraphs (3) and (4), a supplementary assessment may be made in respect of a penalty if an earlier assessment operated by reference to an underestimate of potential lost revenue. 14 (1) HMRC may suspend all or part of a penalty for a careless inaccuracy under paragraph 1 by notice in writing to P. (2) A notice must specify - (a) what part of the penalty is to be suspended, (b) a period of suspension not exceeding two years, and (c) conditions of suspension to be complied with by P. (3) HMRC may suspend all or part of a penalty only if compliance with a condition of suspension would help P to avoid becoming liable to further penalties under paragraph 1 for careless inaccuracy. 15 (1) A person may appeal against a decision of HMRC that a penalty is payable by the person. (2) A person may appeal against a decision of HMRC as to the amount of a penalty payable by the person. (3) A person may appeal against a decision of HMRC not to suspend a penalty payable by the person. … 17 (1) On an appeal under paragraph 15(1) the … tribunal may affirm or cancel HMRC's decision. (2) On an appeal under paragraph 15(2) the … tribunal may - (a) affirm HMRC's decision, or (b) substitute for HMRC's decision another decision that HMRC had power to make. (3) If the … tribunal substitutes its decision for HMRC's, the … tribunal may rely on paragraph 11 - (a) to the same extent as HMRC (which may mean applying the same percentage reduction as HMRC to a different starting point), or (b) to a different extent, but only if the … tribunal thinks that HMRC's decision in respect of the application of paragraph 11 was flawed. (4) On an appeal under paragraph 15(3) - (a) The tribunal may order HMRC to suspend the penalty only if it thinks that HMRC’s decision not to suspend was flawed… (6) ln sub-paragraphs (3)(b), (4)(a) and (5)(b) “flawed” means flawed when considered in the light of the principles applicable in proceedings for judicial review. (7) Paragraph 14 (see in particular paragraph 14(3)) is subject to the possibility of an order under this paragraph. 18 (1) P is liable under paragraph 1(1)(a) where a document which contains a careless inaccuracy (within the meaning of paragraph 3) is given to HMRC on P’s behalf… (3) Despite sub-paragraphs (1) and (2), P is not liable to a penalty under paragraph 1 or 2 in respect of anything done or omitted by P’s agent where P satisfies HMRC that P took reasonable care to avoid inaccuracy (in relation to paragraph 1) …”
“It seems to me that there the learned Judge puts the Inspector's figures in precisely the right way; they are a suggested reconstruction. Later the learned Judge said "Indeed, it is quite impossible to see how the Crown, in cases of this kind, could do anything else but attempt to draw inferences. The true facts are known, presumably, if known at all, to one person only - the Appellant himself. If once it is clear that he has not put before the tax authorities the full account of his income, as on the quite clear inferences of fact to be made in the present case he has not, what can then be done?" and the learned Judge goes on to say that he thinks that the Commissioners have rightly reached their conclusion in the present case.”
“…a deliberate inaccuracy occurs when a taxpayer knowingly provides HMRC with a document that contains an error with the intention that HMRC should rely upon it as an accurate document. This is a subjective test. The question is not whether a reasonable taxpayer might have made the same error or even whether this taxpayer failed to take all reasonable steps to ensure that the return was accurate. It is a question of the knowledge and intention of the particular taxpayer at the time.”