Before you upload your invoice, you can edit the taxes and add shipping costs.

Taxes
Candex allows you to edit the local tax on your invoice according to the available tax levels in your area.

Shipping
When ordering goods, some buyers allow their vendors to add the shipping costs on top of the total amount of the order.
On the Add Invoice page next to the Billable Item click on the Detail button. Over there you can add your shipping details and costs to the amount of the invoice.