Available in Sage 50 Premium Accounting and higher.
Assign a Department to a Vendor
To assign a department to a vendor:
- Open the  vendor's record. 
How?- In the Home window, click Vendors & Purchases on the navigation pane.
 - In the Tasks pane, right-click the Vendors icon and select Modify Vendor from the menu.
 - Select a vendor from the list and click OK.
 - Click the Address tab.
 
 - On the Address tab, select a Department from the list.
 - Click Save and Close.