I left reply in your other thread:
https://community.auctiva.com/e...748609941/m/65010364
In the Revise Listing on eBay look for"Decide how you'd like to be paid" you'll find the "Require immediate payment when buyer uses Buy It Now" radio button just below the "Your PayPal account email address (to receive payments)" field. That would be on the first page.