UNTIED ENTERPRISE LTD is a UK-based financial technology company that provides a mobile and web application for personal tax management. Founded in 2019, the company's mission is to simplify the tax process for the self-employed, landlords, and others who file Self Assessment tax returns. The untied app uses Open Banking to connect to users' bank accounts, automates the categorisation of income and expenses, calculates tax owed in real-time, and enables direct submission of tax returns to HM Revenue & Customs (HMRC), making it the first end-to-end app of its kind recognised by the authority.