Red Hot Toys commented on Check box for promotional email subscription in the account registration form

Thats ok, do you mind helping me with this . I cant seem to understand Shopify's refund system.   All I want to do is apply a discount myself to a customer's order so the amount is no longer due?

https://ecommerce.shopify.com/c/ecommerce-discussion/t/how-do-i-issue-a-refund-172818