You have the following to options depending on your Tax Setup configuration:

Option 1 - You can enable the use of VAT/GST (Product Inclusive) tax selection in the Cart Settings under the Tax Setup section. When VAT/GST Tax is checked the cart will charge the tax rate entered in the “Tax Rate” textbox and implement the VAT/GST tax calculation. You will need to load all product pricing inclusive of VAT/GST tax.

Option 2 - You can enter the Unit Cost of the Product with the tax included and you can enable the Tax Exempt feature in the Product setup screen to prevent any addition tax from being applied.

Currently the Cart does not have the ability enter a different Tax Rate individually for each product, if you would like to recieve a quote for adding this feature, please send an email to sales@smith-consulting.com. We quote all features enhancements below cost since it is enhancing the module.

Thanks