Most employees never fill in a tax return — their tax is collected through PAYE using a tax code. These guides explain how Income Tax bands, the Personal Allowance, tax codes, National Insurance and payslip deductions fit together, and what to check if something looks wrong.
Tax rules, rates and thresholds change from one tax year to the next and depend on your personal circumstances, so always confirm current figures on GOV.UK or with HMRC before you act.