HM Revenue and Customs (HMRC) is the UK government department responsible for collecting taxes and administering the tax system. HMRC is responsible for ensuring that individuals and businesses pay the correct amount of tax and that they comply with tax laws and regulations.

HMRC is responsible for collecting a range of taxes, including income tax, corporation tax, value-added tax (VAT), and national insurance contributions. It also administers a number of tax credits and benefits, such as Child Benefit and Working Tax Credit.

HMRC provides various services to help individuals and businesses understand their tax obligations and manage their tax affairs. These services include online tools and resources, such as HMRC Online Services, as well as telephone and in-person support.

If you are a UK taxpayer and have questions about your tax obligations or need help with your tax affairs, you can contact HMRC for assistance. HMRC has a number of resources available to help you understand your tax obligations and to ensure that you are in compliance with UK tax laws.