By default all your orders will be Taxable.
However, your Orders can quickly be switched between Taxable or NonTaxable.
To toggle between these two options go to the applicable Order.
Click on the “Line Items” tab.
Click on the green “Edit Order” button.
At the bottom of the Line Items field untick the box for “Invoice is Taxable”.
Click the green “Save Order” button.
You'll see the Tax and Subtotal at the bottom of the screen change.
To make the invoice Taxable again follow the above steps but Tick the box.