To change the "Sold To" information that is displayed on your Invoice/Quote, it can be changed on the "Client/Customer" Tab in the Order Workflow Bar. Under the "Client/Customer" Tab, go to the "Client Address" tile and assign an existing option to the order by clicking the empty circle. You will get a message in the upper right corner of your screen letting you know it has been assigned to that order.
If you need to add in a new Client Address to change your "Sold To" information, you can do this by clicking the "+" icon.
Fill out the Address Form, all of this information will be displayed on the invoice.