After you submit your Purchase Order (PO) via the CRM, any changes you need to make must be coordinated by the branch you submitted the order to. To find what branch to contact, follow the below steps
Log into your account
From the menu, choose Projects
Locate and open the Project whose PO you need help with
Once the project opens, click Purchase Orders from the top menu
All the PO's associated with the project will appear
Locate and click the PO to open it
A new tab will open with the PO details
At the top of the Purchase Order Details screen, you will see a blue box with contact information for you to reach out to your sales rep