When you set up a new vendor on a vendor card, there are fields that must always be filled in, fields that can be filled in as needed, and fields in which you cannot enter anything.
Open the 
Vendor Card window.
Fill in the fields on the card. The following fields are mandatory:
No.
Gen. Bus. Posting Group
VAT Bus. Posting Group
Vendor Posting Group
Application Method
For Help about a specific field, click the field and press F1.
When you set up a new vendor, if you have integrated the Vendor table with the Contact table, the program automatically creates a new contact in the Relationship Management application area.
Setting Up Vendor Posting Groups
Setting Up Vendor Bank Accounts
Assigning Currency Codes to Vendors
Assigning Country Codes to Vendors
Assigning Language Codes to Vendors