“(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, or, or (b) that an assessment to tax is or has become insufficient, or …. 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; …unless one of the two conditions mentioned below is fulfilled. (4) The first condition is that the situation mentioned in subsection (1) above [was brought about carelessly or deliberately by] the taxpayer or a person acting on his behalf…”
“As I have already observed, apart from a Closure Notice, and the power to correct obvious errors or omissions, the only other method by which the Revenue can impose additional tax liabilities or recover excessive reliefs is under the new s.29. That confers a far more restricted power than that contained in the previous s.29. The power to make an assessment if an Inspector discovers that tax which ought to have been assessed has not been assessed or an assessment to tax is insufficient or relief is excessive is now subject to the limitations contained in s.29(2) and (3) (s.29(1)). S.29(2) prevents the Revenue making an assessment to remedy an error or mistake if the taxpayer has submitted a return in accordance with ss.8 or 8A and the error or mistake is in accordance with the practice generally prevailing when that return was made. S.29(3) prevents the Revenue making a discovery assessment under s.29(1) unless at least one of two conditions is satisfied (s.29(3)). The prohibition applies unless the undercharge or excessive relief is attributable to fraudulent or negligent conduct (s.29(4)) or having regard to the information made available to him the Inspector could not have been reasonably expected to be aware that the taxpayer was being undercharged or given excessive relief (s.29(5)). There are statutory limitations as to the time at which the sufficiency or otherwise of the information must be judged. These provisions underline the finality of the self-assessment, a finality which is underlined by strict statutory control of the circumstances in which the Revenue may impose additional tax liabilities by way of amendment to the taxpayer's return and assessment.”
“60. Both parties accepted that the legal approach to whether there is a "discovery" is correctly set out in this first passage from the decision of the UT in Charlton & others v RCC[2012] UKUT 770 (TCC) ;[2013] STC 866 at [37], where the tribunal said: "37. In our judgment, no new information, of fact or law, is required for there to be a discovery. All that is required is that it has newly appeared to an officer, acting honestly and reasonably, that there is an insufficiency in an assessment. That can be for any reason, including a change of view, change of opinion, or correction of an oversight." The UT continued in a second passage: "The requirement for newness does not relate to the reason for the conclusion reached by the officer but to the conclusion itself. If an officer has concluded that a discovery assessment should be issued, but for some reason the assessment is not made within a reasonable period after that conclusion is reached, it might, depending on the circumstances, be the case that the conclusion would lose its essential newness by the time of the actual assessment." 61. I agree with the UT's approach in both passages. The requirement for the conclusion to have "newly appeared" is implicit in the statutory language "discover". The discovery must be of one of the matters set out in (a) to (c) of section 29(1). In the present case the officer must have newly discovered that an assessment to tax is insufficient. It is his or her new conclusion that the assessment is insufficient which can trigger a discovery assessment. A discovery assessment is not validly triggered because the officer has found a new reason for contending that an assessment is insufficient, or because he or she has decided to invoke a different mechanism for addressing an insufficiency in an assessment which he or she has previously concluded is present. (3) In the same case ( HMRC v Tooth[2018] UKUT 38 (TCC) ) the Upper Tribunal explained at paragraph 79 “…the same officer (or officers) cannot make the same discovery twice. We see no reason, however, why the same officer cannot, for different reasons, discover that one of the situations set out in section 29(1)(a), (b) or (c) pertains a second time. Suppose an officer discovers that an assessment to tax has become insufficient for a certain reason, but HMRC decides not to issue an assessment because the point is controversial and the amount small. Suppose that officer then - for different reasons - discovers that the assessment has become insufficient. We consider that this, second, discovery could justify the making of an assessment. The position is, obviously, a fortiori where two different officers are independently involved. Again, provided the basis for the discovery is different, there is a statutory basis under section 29(1) for issuing two assessments. What, however, if two different officers independently make the same discovery? In our judgment, as a matter of ordinary English, a discovery can only be made once. We accept that section 29(1) TMA is framed by reference to the subjective state of mind of an officer or the board, but what is a “discovery” is an objective term. It seems to us that in this case, the first officer makes the discovery; the second officer simply finds out something that is new to him. In particular if one officer is made aware of, and accepts, the conclusion of another officer it cannot be said that the first officer made a discovery” (4) A discovery can become stale. In Pattullo v HMRC[2016] UKUT 270 (TCC) the Upper Tribunal held at paragraph 52 “ The context makes it clear that an assessment may be made if and when it is discovered that the assessment to tax is insufficient. It would, to my mind, be absurd to contemplate that, having made a discovery of the sort specified in s 29(1), HMRC could in effect just sit on it and do nothing for a number of years before making an assessment just before the end of the limitation period specified in s 34(1)”
“ (1) s 29(1) refers to an officer (or the Board) discovering an insufficiency of tax; (2) the concept of an officer discovering something involves, in the first place, an actual officer having a particular state of mind in relation to the relevant matter; this involves the application of a subjective test; (3) the concept of an officer discovering something involves, in the second place, the officer’s state of mind satisfying some objective criterion; this involves the application of an objective test; (4) if the officer’s state of mind does not satisfy the relevant subjective test and the relevant objective test, then the officer’s state of mind is insufficient for there to be a discovery for the purposes of sub-s (1); (5) s 29(1) also refers to the opinion of the officer as to what ought to be charged to make good the loss of tax; accordingly, the officer has to form a relevant opinion and such an opinion has to satisfy some objective criterion;..” (6) In Anderson the Upper Tribunal also elaborated upon the test to be applied and suggested the following formulations: (a) For the subjective element for a discovery assessment to be satisfied “The officer must believe that the information available to him points in the direction of there being an insufficiency of tax.”, and (b) For the objective element “as regards the requirement for the action to be “reasonable”, this should be expressed as a requirement that the officer’s belief is one which a reasonable officer could form. It is not for a tribunal hearing an appeal in relation to a discovery assessment to form its own belief on the information available to the officer and then to conclude, if it forms a different belief, that the officer’s belief was not reasonable.” (7) There is a very real “moment” of discovery. The Upper Tribunal in HMRC v Charlton Corfield & Corfield[2012] UKUT 770 (TCC) explained it as follows: “…the word ‘discovers’ does connote change, in the sense of a threshold being crossed. At one point an officer is not of the view that there is an insufficiency such that an assessment ought to be raised, and at another he is of the view”
“The Respondents submit that a discovery of an insufficiency of tax was made following the self-invigilation exercise, test purchases, unannounced visits, purchase review, subsequent enquiries by HMRC officers and the exchange of correspondence.”
“Limitation reflects a fundamental and all but universal legal policy that the litigation of stale claims is potentially a significant injustice. Delay impoverishes the evidence available to determine the claim, prolongs uncertainty, impedes the definitive settlement of the parties’ mutual affairs and consumes scarce judicial resources in dealing with claims that should have been brought long ago or not at all”