This figure was lower because this year we identified and contacted almost double the number of taxpayers than in a typical year to revise their tax returns downwards.
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.