Edit the tax rates used in the software by selecting Settings -> Taxes from the main menu.
In the tax edit view, you can select a default tax rate by moving the selection to the desired tax rate. The default tax rate is automatically offered, for example, when you create new product in the system. You can add a new tax rate by clicking the +Add -button. Under the Tax Amount, enter the tax rate you want. To delete the tax rate, click the Delete -button on the right side of the row. Click the Save -button to save of your changes.