We need to be able to link the Invoice Item Data Source to the Quote Charge object in Z-Quotes, so that we can identify which lines are tax lines.
Currently there is no way to identify which of the Invoice Items are tax lines. The only workaround is to take the lowest value for the Quote, but this is not a reliable or robust workaround.
In order to facilitate this link, the "Zuora Subscription Rate Plan Charge ID" must be made available in the Quote Charge object.
See Request #11438.
