“Tax enquiry” means—
(a) an enquiry under section 9A or 12AC of TMA 1970 (enquiries into self-assessment returns for income tax and capital gains tax), including an enquiry by virtue of notice being deemed to be given under section 9A of that Act by virtue of section 12AC(6) of that Act,
(b) an enquiry under paragraph 5 of Schedule 1A to that Act (enquiry into claims made otherwise than by being included in a return),
(c) an enquiry under paragraph 24 of Schedule 18 to FA 1998 (enquiry into company tax return for corporation tax etc), including an enquiry by virtue of notice being deemed to be given under that paragraph by virtue of section 12AC(6) of TMA 1970,
(d) an enquiry under paragraph 12 of Schedule 10 to FA 2003 (enquiries into SDLT returns),
(e) an enquiry under paragraph 8 of Schedule 33 to FA 2013 (enquiries into annual tax for enveloped dwellings returns), or
(f) a deemed enquiry under subsection (6).