Self-Assessment is a system HM Revenue and Customs ( HMRC ) uses to collect Income Tax. Tax is usually deducted automatically from wages, pensions, and savings. People and businesses with other income must report it in a tax return. The idea of Self-Assessment is that you are responsible for completing a tax return each year if you need to, and for paying any tax due for that tax year. It is your responsibility to tell HM Revenue & Customs (HMRC) if you think you need to complete a tax return. We at Theron Accounting can save you a lot of time, money and worry by handling your self-assessment for you. We will do all the necessary computations, complete your returns, and even offer how to Minimize Tax Liabilities.