Comment by awjlogan

No, you don't have to. If you are employed through a company, stay below £100K income and don't have other income then (generally) you don't need to do a tax return - it's all handled automatically through pay as you earn payroll. However, as shown, a lot of people are self employed, want to claim deductions, have some side income etc. However, for those that do need to, it is really straightforward.