“On receiving an application for permission to appeal the Upper Tribunal may review the decision in accordance with rule 46 (review of a decision), but may only do so if— 20 (a) when making the decision the Upper Tribunal overlooked a legislative provision or binding authority which could have had a material effect on the decision; or (b) since the Upper Tribunal’s decision, a court has made a decision which is binding on the Upper Tribunal and which, had 25 it been made before the Upper Tribunal’s decision, could have had a material effect on the decision.”
“[27] Matters would have been different if the taxpayer had calculated his liability to income and capital gains tax by requesting and completing the tax calculation summary pages of the tax return. In such circumstances the 20 Revenue would have his assessment that, as a result of the claim, specific sums or no sums were due as the tax chargeable and payable for 2007/08. Such information and self assessment would in my view fall within a ‘return’ under section 9A of TMA as it would be the taxpayer’s assessment of his liability in respect of the relevant tax year. The Revenue could not go 25 behind the taxpayer’s self assessment without either amending the tax return (section 9ZB of TMA) or instituting an enquiry under section 9A of TMA.”