Understanding who needs to complete a self-assessment is essential for your UK tax compliance. HMRC uses the Self Assessment system to collect income tax from people and companies whose earnings aren’t automatically taxed at the source. If you fit into any of a few particular categories, you have to file your return by the due date or risk penalties. Do I Need to File a Self-Assessment Tax Return? Do I have to file a self-assessment? You probably need to register and file if you have received income that isn’t taxed at the source, such as from investments, self-employment, rental property, or specific benefits. Among the primary requirements are: If you haven’t filed before and you fit into any of these categories, you have to register for Self Assessment with HMRC…