I have 2 invoices to the same customer both are unpaid because the invoice amount has changed how do i send then a credit note without it leaving it on they record?

Hello Accounts-bellsba, thanks for posting on the Community page,  no you cant do this, the point of a transaction is that they are recorded, you cant do anything in QuickBooks without it being recorded in some way. You would have to select the customer's account to record the credit note so that it shows up on that account for them.