It would be very handy if approved rebate lines could be edited within the same agreement, and audit trail of the changes kept and a workflow to approve those changes.

The logic could be similar to the one of editing leasing agreements. The dates on the existing lines should be expired and a new line should be added below with new data for the coming periods.

At the moment, the only option available to make changes to a rebate after it's been approved is to copy all the data into a new deal and deactivate the old one.

Also, I think there should be a dedicated category in this portal for the rebates module.