“ 29 Assessment where loss of tax discovered (1) If an officer of the Board or the Board discover, as regards any person (the taxpayer) and a year of assessment – (a) that any income which ought to have been assessed to income tax, or chargeable gains which ought to have been assessed to capital gains tax, have not been assessed, ..... the officer or, as the case may be, the Board may, subject to subsections (2) and (3) below, make an assessment in the amount, or the further amount, which ought in his or their opinion to be charged in order to make good to the Crown the loss of tax. .... (3) Where the taxpayer has made and delivered a return under section 8 or 8A of this Act in respect of the relevant year of assessment, he shall not be assessed under subsection (1) above – (a) in respect of the year of assessment mentioned in that subsection; and (b) in the same capacity as that in which he made and delivered the return, unless one of the two conditions mentioned below is fulfilled. (4) The first condition is that the situation mentioned in subsection (1) was brought about carelessly or deliberately by the taxpayer or a person acting on his behalf.”
“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 amount 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? Of course all estimates are unsatisfactory; of course they will always be open to challenge in points of detail; and of course they may well be under-estimates rather than over-estimates as well. But what the Crown has to do in such a situation is, on the known facts, to make reasonable inferences. When, in para 7(b) of the Case Stated, the Commissioners state that (with certain exceptions) the Inspector’s figures were ‘fair’, that is, in my judgment, precisely and exactly what they ought to be – fair. The fact that the onus is on the taxpayer to displace the assessment is not intended to give the Crown carte blanche to make wild or extravagant claims. Where an inference, of whatever nature, falls to be made, one invariably speaks of a ‘fair’ inference, Where, as is the case in this matter, figures have to be inferred, what has to be made is a ‘fair’ inference as to what such figures may have been. The figures themselves must be fair.”
“(6) If, on an appeal notified to the tribunal, the tribunal decides – .... (c) that the appellant is overcharged by an assessment other than a self-assessment, the assessment .... shall be reduced accordingly, but otherwise the assessment .... shall stand good.”
“ 34 Ordinary time limit of six years (1) Subject to the following provisions of this Act, and to any other provisions of the Taxes Act allowing a longer period in any particular class of case, an assessment to income tax or capital gains tax may be made at any time not later than five years after the 31 st January next following the year of assessment to which it relates 36 Fraudulent or negligent conduct (1) An assessment on any person (in this section referred to as “the person in default”) for the purpose of making good to the Crown a loss of income tax or capital gains tax attributable to his fraudulent or negligent conduct or the fraudulent or negligent conduct of a person acting on his behalf may be made at any time not later than 20 years after the 31st January next following the year of assessment to which it relates ”
“ 7 Notice of liability to income tax and capital gains tax (1) Every person who – (a) is chargeable to income tax or capital gains tax for any year of assessment, and (b) has not received a notice under section 8 of this Act requiring a return for that year of his total income and chargeable gains shall, subject to subsection (3) below, within six months from the end of that year, give notice to an officer of the Board that he is so chargeable. .... (8) If any person, for any year of assessment, fails to comply with subsection (1) above, he shall be liable to a penalty not exceeding the amount of the tax – (a) in which he is assessed under section 9 or 29 of this Act in respect of that year, and (b) which is not paid on or before the 31 st January next following that year. .... 95 Incorrect return or accounts for income tax or capital gains tax (1) Where a person fraudulently or negligently – (a) delivers any incorrect return of a kind mentioned in section 8... of this Act... ... he shall be liable to a penalty not exceeding the amount of the difference specified in subsection (2) below. (2) The difference is that between – (a) the amount of income tax and capital gains tax payable for the relevant years of assessment by the said person (including any amount of income tax deducted at source and not repayable); and (b) the amount which would have been the amount so payable if the return.... as made or submitted by him had been correct.”
“ 100 Determination of penalties by officer of the Board (1) ....an officer of the Board authorised by the Board for the purposes of this section may make a determination imposing a penalty under any provision of the Taxes Acts and setting it at such amount as, in his opinion, is correct or appropriate. .... 100B Appeals against penalty determinations (1) An appeal may be brought against the determination of a penalty under section 100 above and, subject to sections 93 and 93A of this Act and the following provisions of this section, the provisions of this Act relating to appeals shall have effect in relation to an appeal against such a determination as they have effect in relation to an appeal against an assessment to tax except that references to the tribunal shall be taken to be references to the First-tier Tribunal. (2) Subject to sections 93(8) and 93A(7) of this Act on an appeal against the determination of a penalty under section 100 above section 50(6) to (8) of this Act shall not apply but – (a) in the case of a penalty which is required to be of a particular amount...... .... (b) in the case of any other penalty, the First-tier Tribunal may – (i) if it appears that no penalty has been incurred, set the determination aside, (ii) if the amount determined appears to be appropriate, confirm the determination, (iii) if the amount determined appears to be excessive, reduce it to such other amount (including nil) as it considers appropriate, or (iv) if the amount determined appears to be insufficient, increase it to such amount not exceeding the permitted maximum as it considers appropriate.”