You can submit your sole trader self-assessment tax return directly with HMRC online. You will need to have previously registered for sole trader self-assessment and must have your unique tax reference (UTR) number to log in and submit your return. Your self-assessment must be correct, and you will be required to declare all your income, as well as expenses and profits earned throughout that tax year. As an accounting provider, we can assist you in making sure your self-assessment is correct and is submitted on time. If you have any questions about self-assessment filing or would like a quote for us to perform your self-assessment, please let us know.