To simplify the refund process, the invoice dropdown menu would probably become more efficient with a refund option that also enables partial refunds. Particularly helpful if the need arises to cancel a contract, which requires a refund of the deposit, or for any other reason. Voiding invoices is counterproductive. It would be good to have refunds recorded as refunds on the invoice with a big REFUNDED in full or PARTIALLY REFUNDED mark on the page.