If you want to change the proposed listing info, you can edit your listing in the SellHound app before hitting the “Post to eBay” button. And actually, we require that you carefully read and approve your listing before posting to eBay as you are completely responsible for the contents of your listing.
If you have already posted your item to eBay you may revise it directly on eBay.
After reviewing, if you do not see the "Post to eBay" button, you may need to tap and hold/swipe your listing in the grey area so that you can get to the "Post to eBay" near the bottom of the screen.