Paragraph 20 Time limits for assessments

The normal rule is that an assessment of a person to tax (other than a self-assessment) may be made at any time within the period of 4 years beginning with the day (“the relevant day”) after the end of the period in which the person was required to make and deliver a return.

But an assessment on a person in a case involving a loss of public interest business protection tax brought about carelessly by the person may be made at any time within the period of 6 years beginning with the relevant day.

And an assessment on a person in a case involving a loss of public interest business protection tax brought about deliberately by the person may be made at any time within the period of 20 years beginning with the relevant day.