Being new to QuickBooks, I sent them a single invoice based on an estimate and instructed them to only pay part for a product order and then pay the rest when I finish the service of installing it. The completion of the service has been delayed into a new tax year, so I don't want to count it in accounts receivable as it has not been completed yet even though the invoice has been sent and is partially paid. So, I am trying to figure out how to separate the estimate charges from a single invoice into two different ones so that I can send a separate invoice for the remaining balance in the new tax year when the service is complete.