If a change order has already been approved, you will not see the option to edit a change order. Since approved change orders are distributed to key stakeholders (e.g. responsible contractors), information about the change order must be locked down and static to ensure the financial and historical integrity of each change order. If you need to edit a change order, you must unapprove the change order. You can only do this by first unapproving any change orders that were approved since that particular change order was approved. For more information, see Step #3 in Delete a Potential Change Order Or Change Order Request.