Please could you advise me how to create a discount on an invoice once the invoice has been settled? I created an invoice for £800 but later decided to give the customer a £200 discount, I put the £600 payment through but it left £200 outstanding, I then went into banking and clicked on receipt/payment and amended the entry for £200 which cleared the outstanding payment to zero but it went to payment on account, will this come back for me to deal with later?