Currently on Invoice Reports we can display the GST/HST Registration Number, However the QST Registration Number cannot be added to reports. 

Many companies require both the GST/HST & QST Registration Number for expense reporting.

It does not need to be added to reports by default but having the option to add it to a report if requested would be really helpful. It would be nice to add the field so it can be accessed with RDL or Word XML Mapping.