Follow the below instructions in order to populate the FNSKU (Fulfillment Network Stock Keeping Unit) for your FBA item in SellerChamp:

Step 1: Locate the item within the SellerChamp manifest or inventory page

Step 2: Click on the Edit listing icon directly across the item.

Step 3: This will display the Update Item module

Here, navigate to the FNSKU option and click on the Refresh button

SellerChamp will automatically populate the FNSKU for the item