Recipient created invoicing is currently unavailable in QBO. As of now, you'll have to create a separate invoice showing the original cost.
Then, create a bill for the expenses deducted and to be able to send a remittance advice.
The total paid showing on the remittance advice includes details of the bill being paid but does not include the credits in detail or take them into account in the total.
To create an invoice:
To create a remittance advice:
Hope this helps.