B.      Adeiladu agwedd fwy effeithiol a chydgysylltiedig at drethi ar draws y trethi Cymreig presennol ac ar draws y dirwedd drethi ehangach – gan gynnwys opsiynau i wella trefniadau rhannu data a chryfhau’r sail dystiolaeth fel sail i benderfyniadau trethi.
B.      Build a more effective and coordinated approach to tax across existing Welsh taxes and across the wider tax landscape - including the options to improve data sharing and to strengthen the evidence base to inform tax decisions.