If an order is made and the shipping is zero/free, then don't send the shipping with the order. If an order with amount 0 is processed it will have tax 0, and it can't be changed later.
You can change shipping, but the tax rate will remain zero. So if the shipping is zero, don't send it with the order.
If an order is made and the shipping is zero/free, then don't send the shipping with the order. If an order with amount 0 is processed it will have tax 0, and it can't be changed later.
You can change shipping, but the tax rate will remain zero. So if the shipping is zero, don't send it with the order.