We have entered a Progress Payment with the incorrect percentage. Can we fix this?
First do an invoice for 0% and add a new line to that invoice to be the credit value.
Eg, -1 the amount of the 30% and process it, that way you have your credit for the first 30% invoice.
The percentage claimed to date, in the Job record will need to be changed. This will need to be done by Infusion Support or your Partner in Command Mode.