Step 1:

Go to Integration > Sales Channels

Step 2:

Click on edit button on eBay channel

Step 3:

Set "Yes" for Allow listing upload

Other options:

• Set Yes to Upload product quantity to enable product quantity upload to ebay.
• Set Yes to Upload product prices to enable product prices upload to ebay.
• Set Yes to Upload product images to allow product iamges upload to ebay.
• Set Yes to Download orders & upload shipments to enable order download to Ricemill and shipment info upload to eBay.