UTR, or Unique Taxpayer Reference, is a 10 digit number issued by HM Revenue and Customs (HMRC) to identify you for tax purposes in the UK. If you’re self employed, run a business, or need to file a self-assessment tax return, you’ll need a UTR number. This blog will guide you through the process of getting your UTR, whether you’re just starting out or have misplaced your existing number.