If you have any queries about the tax you’ve paid, or if you think you have paid too much tax, you can contact HM Revenue & Customs (HMRC). If you’re due a refund, you’ll need to complete either a P50Z, P53Z or P55 form depending on your personal circumstances. You can contact HMRC on 0300 200 3300 or visit www.gov.uk/government/organisations/hm-revenue-customs to find the form you need.