Cash is in bank account, sale receipt done. Now customer ask for discount. How to record this? There will be a bank withdraw, it need to be record in quickbooks

cash deposit from purchase match sale receipt. If I need to refund the customer partially, (example: $10 discount)
The $10 will be withdraw from bank account. If I edit the sale receipt, it won't match with the original deposit. The withdraw of $10 has to be record in qucikbook. How to do this?

If I use a Credit Receipt, it is not possible to record only a discount, I have to add "product/service"

HELP