“(1) For the purpose of establishing the amounts in which a person is chargeable to income tax and capital gains tax for a year of assessment, and the amount payable by him by way of income tax for that year, he may be required by a notice given to him by an officer of the Board— ( a ) to make and deliver to the officer, a return containing such information as may reasonably be required in pursuance of the notice, and ( b ) to deliver with the return such accounts, statements and documents, relating to information contained in the return, as may reasonably be so required. … “(1D) A return under this section for a year of assessment (Year 1) must be delivered— ( a ) in the case of a non-electronic return, on or before 31st October in Year 2, and ( b ) in the case of an electronic return, on or before 31st January in Year 2. “(1E) But subsection (1D) is subject to the following two exceptions. “(1F) Exception 1 is that if a notice in respect of Year 1 is given after 31st July in Year 2 (but on or before 31st October), a return must be delivered— ( a ) during the period of 3 months beginning with the date of the notice (for a non-electronic return), or ( b ) on or before 31st January (for an electronic return). “(1G) Exception 2 is that if a notice in respect of Year 1 is given after 31st October in Year 2, a return (whether electronic or not) must be delivered during the period of 3 months beginning with the date of the notice.”