What is a UTR number?
A UTR (Unique Taxpayer Reference) number is a 10 digit number that is unique to either you or your company. It identifies you personally with HMRC for things related to your tax obligations. You’ll automatically get one when you register for self assessment or set up a limited company. You can find your UTR number on previous tax returns or HMRC documents such as “Welcome to Self Assessment” SA250 letter.