HMRC has increasingly relied on ‘nudge’ letters to encourage taxpayers to review their tax returns and correct any errors or omissions. These letters are part of HMRCโs strategy to address the tax gapโestimated at ยฃ35.8 billion for the 2021 to 2022 tax yearโby identifying discrepancies through advanced data collection and analysis. Hereโs what you need to know and do if you receive one of these letters.