Currently the financial tags can be inherited from the sales order. But when one create an invoice (SO invoice) from a billing schedule, the financial tags are not inherited. The sales order must be edited (edit & save) to obtain the inheritance of the financial tags. This editing is against the process and the option that allows to generate an invoice from the billing schedule directly.

The financial tags should be inherited also when the invoice is generated from the billing schedule.

More details can be found in ticket: 2605051420001157