We refunded around £92,000 to taxpayers because of errors we identified in their tax returns which caused them to overpay tax.
Roedd y ffigwr hwn yn is oherwydd eleni gwnaethom adnabod a chysylltu â bron i ddwywaith mwy o drethdalwyr nag y byddwn mewn blwyddyn arferol er mwyn diwygio eu ffurflenni treth tuag i lawr.