“22. The self-assessment that the taxpayer is required to file as part of his return must state the amount of tax for which the taxpayer is liable. One would naturally expect that an amendment to that assessment must likewise state the amended amount of tax for which he is liable. The formal requirements for the validity of a closure notice must be the same irrespective of the sophistication of the particular taxpayer and the skill of his professional advisers, if indeed he has any. Section 28A (2) (b) requires the amendment of the return to be made by the closure notice itself; not merely by an officer of HMRC. So, unless incorporated by reference, Mrs Cook's amendment of the on-line return cannot itself satisfy the words of the sub-section. I think that this conclusion coincides with the view of the FTT in Wong Yau Lam and Sau Yau Lam (t/a Sunlight Takeaway) v HMRC[2016] UKFTT 659 (TC) . That concerned a closure notice relating to a partnership return, to which section 28B rather than section 28A applies. At [25] the Tribunal stated: ‘The provisions which in our view govern the issue and effectiveness of a closure notice are subsections (1) to (3) of s 28B. Section 28B (1) sets out how an enquiry is completed. It describes a "closure notice" as a notice from an officer of HMRC that "informs the taxpayer that he has completed his enquiries and states his conclusions". It is apparent that a document that does not do these things will not be a closure notice, since it will not meet the definition. Section 28B(2) contains an additional mandatory requirement for the content of a closure notice: it must either state that no amendment of the return is required or it must "make the amendments of the return required to give effect to his conclusions”’. (Emphasis added)… 23 ….it is the closure notice itself that makes the amendments of the return under that subsection. (Emphasis added)”