The document outlines the details of the 'Requirement to Correct' (RTC) legislation, effective from September 30, 2018, which mandates individuals with overseas tax liabilities to rectify their tax affairs or face severe penalties. It discusses the potential negative consequences, including higher penalties for careless or deliberate non-compliance relating to overseas income, and provides insights into how HMRC is gathering information to enforce compliance. Additionally, it emphasizes the risks of relying on 'disqualified advice' from tax advisors involved in non-compliance and the implications for individuals seeking to mitigate penalties through disclosures.