“ 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 .”
“ However, we consider that the term ‘deliberate inaccuracy on a personʼs part’ can extend beyond this. Our view is that, depending on the precise circumstances, an inaccuracy may also be held to be deliberate where it is found that the person consciously or intentionally chose not to find out the correct position, in particular, where the circumstances are such that the person knew that he should do so. A person cannot simply escape liability by claiming complete ignorance where the person clearly knew that he should have taken steps to ascertain the position. We view the case where a person makes such a conscious choice not to take such steps with the result that an inaccuracy occurs, as no less of a ‘deliberate inaccuracy’ on that personʼs part than making the inaccuracy with full knowledge of the inaccuracy .”