How do I enable SKU uploads in a catalog?
The Catalog Info page includes an Enable SKU Upload option that is currently only compatible with the Common Checkout Page (CCP) payment gateway. When this option is enabled within a catalog, SKUs can be added manually to individual listings or bulk uploaded via API. By default, this option is disabled and can be enabled in a catalog or by sub-catalog.
Open Admin

In the User Menu, click the Admin link.
Open Catalogs

Click the Catalogs link.
Enable SKU Upload

Click the Enable SKU Upload button.
Save Catalog Info

Click the Save button.