Looking for a VAT (Value Added Tax) Calculator for UK website where user enters amount with buttons and either chooses 'Add Vat' button or 'Remove VAT' button to calculate. There should be a slider which allowes users to change the rate of VAT.
The slider should be set at current rate of 20% when user comes to site but when rate changes in future I need to be able to change this to that rate.
When user presses 'Add Vat' button or 'Remove VAT' button the calculator should change to show 'Net Amount (excluding VAT), VAT (at 20% (or whatever rate is selected)), Gross Amount (including VAT), Calculation based on: (the amount entered on 1st part), and then a start again link which takes them back to start.
If you need an example of what I'm talking about message me and I'll provide a link to one!