Pretty much the same in the UK. Most people don’t have to file their tax at all (it’s automatically deducted from wages for most people), but for those that do, you can do it for free on the government’s website, which is largely a matter of saying how much you earned, and any relevant deductions. The government then calculates what tax you have to pay. If your tax affairs are more complicated than that, you’re earning enough that you’re in the “having an accountant is mandatory” territory anyway.