The New Vendor form will open. On the General tab, type in any relevant information:
On the Addresses tab, click the New button enter any relevant addresses for the Vendor:
Contacts
On the Contacts tab, enter any Contacts you want to be associated with the Vendor. You can choose to new Contact "from Scratch", add an existing Contact, or import Contacts from Outlook.
Set as Primary
Once you've added a Contact or multiple Contacts, you can set one as the Primary Contact.