This will allow the Authority to expand its work to identify and rectify tax returns which seek to under report tax liability and then to recover those amounts.
Bydd hyn yn caniatáu i'r Awdurdod ehangu ei waith i nodi a chywiro ffurflenni treth sy'n ceisio tan-adrodd yr atebolrwydd i dalu trethi ac yna adennill y symiau hynny.