Thanks for uptading the pluggin. But why on this stamp duty tools the result is different?
Example ￡500.000
https://www.calculatorwidgets.co.uk/stamp-duty-calculator/
https://www.loveyourpostcode.com/stamp-duty/
On this tools for first time buyer the tax is ￡10.000
On your pluggin is ￡15.000
https://www.housesinsale.co.uk/stamp-duty-calculator/
?
