Hi,
When tax is deducted from your pay, a calculation is done based on how much you have paid so far in the tax year and compares that to how much you should have paid so far in the year. Any overpayment of tax would result in you paying less tax in the following month.
If you are unsure if you have paid the correct amount of tax, you can contact our Income Tax team with your latest payslip and we can check this.
Income Tax: general enquiries
Thank you.