I am trying to use a coupon code on a purchase I just made. And payed for. Can I go back in and still use my coupon on this purchase?

Trying to use a coupon on an item I just purchased and payed for. 15 mins ago. Can I somehow go back | Ask a Mentor

Trying to use a coupon on an item I just purchased and payed for. 15 mins ago. Can I somehow go back | Ask a Mentor | eBay Community