What do I do if I think if I’m owed a tax refund?

This video explains what you should do if you think you have paid too much tax and believe you are due a refund. It is the second in a short series of HMRC videos about the tax calculation (also known as the P800) letter which is used to deal with under or over payments of tax. You can also view your Personal Tax Account by visiting https://www.gov.uk/personal-tax-account