The Inland Revenue Department (IRD) of Hong Kong has released a comprehensive guide outlining the tax responsibilities that both individual taxpayers and business operators must observe under the current tax regime. The document details the obligations to file annual tax returns within the stipulated deadlines, the requirement to maintain accurate records of income and expenses, and the necessity to withhold and remit salaries tax, provisional profits tax, and other statutory levies on a timely basis. It explains the calculation methods for territorial source taxation, the treatment of offshore income, and the specific rules governing deductions, allowances, and tax credits. The guide also covers the processes for voluntary tax instalment payments, the use of the e-Rebate system for electronic filing, and the procedures for amending previously submitted returns in the event of errors or omissions. Emphasis is placed on the importance of compliance, with clear explanations of penalty provisions for late filing, underpayment, or submission of false information. Additionally, the IRD provides information on support services, including hotlines, public enquiries, and online resources, aimed at assisting taxpayers in meeting their obligations efficiently. The publication serves as a vital reference for ensuring that both employers and employees fulfil their statutory duties, thereby avoiding unnecessary assessments, interest charges, or legal repercussions.