Self-assessment tax return help for Driving Instructors This guide sets out the basics for getting your tax affairs in order and filling in your self-assessment tax return. Registering with HM Revenue & Customs You need to be registered with HMRC, If not yet registered or newly self-employed, click HERE. HMRC will send you a confirmation of registration and provide you with your unique taxpayer’s reference, or UTR. This is a unique reference for your tax affairs. You should q