Calculations for the end of the tax year 2017 In most cases, tax calculations and deductions are handled by your employer. It is assumed that you pay the correct tax by the end of the year. Find out if you’re owed a tax refund using our UK Tax Refund Calculator Premature PAYE Tax Refunds However, … Continue reading What if you get PAYE Tax calculations for end of tax year 2017-18 or earlier?