Before adding taxes to the prices make sure 'All taxes are included in my prices' option is enabled in merchant settings.
To add more than one tax to an item:
- Sign in to your account on the web as administrator.
- In the main menu select Products.
- In the products list, select a product you wish to edit or create a new product.
- Click on the EDIT button in the product details page on the right.
- Scroll down to the TAXES section.
- Move sliders to the right to add taxes:
- Click SAVE to save changes.
- Re-enter the application to synchronise merchant's account.
Note: VAT changes will now be applied for all future invoices (already issued invoices won't be affected).