You can easily add in your suppliers using the Products and Services tab.
Select Products and Services tab.
Select the Suppliers button.
On the suppliers page select the Create new supplier button.
Enter the New supplier details as required.
Note: You do not need to complete all the fields however it is helpful to do so if you have the information to hand.
The Suppliers will now show in the Suppliers list.
If you need to view or edit the detail you can use the View/Edit link on the right hand side.