The rules which determine when an individual is required to complete a self-assessment return are widely misunderstood. HMRC complicates matter further with an odd set of practices which don’t sit comfortably with the legislation.
Failure to complete a tax return or take the appropriate action to indicate to HMRC that you need to do so can result in significant financial penalties.
The Flow Chart - Requirement to Complete a Self-assessment Return will help you decide if you are required to complete a self-assessment tax return or notify HMRC that you might need to.