Question to the HM Treasury:

To ask the Chancellor of the Exchequer, how many enquiries have hon. Members made to HMRC on errors that led to constituents being overcharged tax in each of the last five years; and what proportion of those enquiries resulted in HMRC repaying overcharged tax in each of the last five years.

HMRC receives enquiries from hon. Members through a variety of channels, including calls, emails and letters, covering a wide range of topics. HMRC does not systematically record which of these enquires specifically relate to instances of overcharged tax, nor whether they resulted in a repayment.

Obtaining this information would require a detailed analysis of every enquiry raised by hon. Members. The level of resource needed to conduct such an in-depth review would exceed the disproportionate cost threshold for written parliamentary questions.