Navigate within your CJ account to Links > Feeds.
If this is your first product feed, you will see an introduction page. Click the Register Feed button to access the feed registration form. The form has the fields below. All fields are required except for non-registered user emails. Note which fields will not be editable after the feed is created. Complete all fields and click Register Feed to be taken back to the Feeds page.
Important points to be entered into this information:
Paste your GMCFeed URL found on your dashboard within the Fetch field URL. (ie. https://gmcfeed.s3.amazonaws.com/exported/xxxxxxxxxxx/gmcfeed.txt)
Source: https://developers.cj.com/docs/data-imports/product-feeds