“Now it is to be remembered that under the law as it stands the duty of the [Tribunal] who hear this appeal is this: Parties are entitled to produce any lawful evidence, and if on appeal it appears to [the Tribunal] by examination of the Appellant…or by other lawful evidence, that the Appellant is overcharged by any assessment, the [Tribunal] shall abate or reduce the assessment accordingly; but otherwise every assessment or surcharge shall stand good. Hence it is quite plain that the [Tribunal is] to hold the assessment as standing good unless the subject - the Appellant - establishes before the [Tribunal]…that the assessment ought to be reduced or set aside.”
“63. In our view, 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.”
“56. The Tribunal [in a previous case] approached the question of whether behaviour was deliberate by considering whether the action was ‘taken consciously where there was an appreciation that there was a choice.’ We consider that is a useful starting point but that also regard should be had to the ordinary meaning of the word ‘deliberate’ which, according to the Oxford English Dictionary, is as follows: ‘Well weighed or considered; carefully thought out; formed, carried out, etc with careful consideration and full intention; done of set purpose; studied; not hasty or rash.’” ‘Well weighed or considered; carefully thought out; formed, carried out, etc with careful consideration and full intention; done of set purpose; studied; not hasty or rash.’”
“69. …The position on an appeal against a ‘best of judgment’ assessment is well-established. The burden lies on the taxpayer to establish the correct amount of tax due: ‘The element of guess-work and the almost unavoidable inaccuracy in a properly made best of judgment assessment, as the cases have established, do not serve to displace the validity of the assessments, which are prima facie right and remain right until the taxpayer shows that they are wrong and also shows positively what corrections should be made in order to make the assessments right or more nearly right.’ (Bi-Flex Caribbean Ltd v Board of Inland Revenue (1990) 63 TC 515, 522-3 PC per Lord Lowry).” and at “73…But, as to the precise calculation of the amount of tax due, in my view, the burden rests on the appellant for all purposes.” ‘The element of guess-work and the almost unavoidable inaccuracy in a properly made best of judgment assessment, as the cases have established, do not serve to displace the validity of the assessments, which are prima facie right and remain right until the taxpayer shows that they are wrong and also shows positively what corrections should be made in order to make the assessments right or more nearly right.’ (Bi-Flex Caribbean Ltd v Board of Inland Revenue (1990) 63 TC 515, 522-3 PC per Lord Lowry).”