A scheduled payment can be deleted at any time if the payment status is PENDING. However, the payment schedule total must sum up to the base total amount for the order line. If a scheduled payment is deleted, a new scheduled payment must be added OR the remaining scheduled payment amounts must be updated. Select the appropriate scheduled payment row from the grid, and click Delete Scheduled Payment. Similarly, click Delete All Unpaid Scheduled Payments to remove all PENDING scheduled payments. As of 7.4.1SP1, if all unpaid scheduled payments are deleted, the system will update the Payment Frequency to Immediate.
As of 7.5.0, if all scheduled payments are deleted and a manual scheduled payment is added, the system will automatically add a line for a write-off, if applicable. For more information on price adjustments and payment schedules, please see Adjusting an Order Line Price with a Payment Schedule.