If you need to apply the tax on certain items, you can do this easily by doing the following:
- In your Sitebuilder, go to Menu > Store.
- Click Settings > Taxes.
- Click Manage Tax Rates.
- Uncheck the box next to "Enabled by default for all products" and next to "Include tax in product prices".
- Click Save.
- Navigate to Catalog > Products.
- For each product you wish to add a specific tax, you need to click on that product and then click on the Tax and Shipping tab.
- Scroll down to the "Taxes" section. Next to "Add New Tax..", toggle the button to the right to enable this feature.
- Click Save.
This will now apply the tax to only products that you have selected VAT for.