In addition to our tax system, we continued to improve the range of support services we offer to make it easier for taxpayers and their representatives to pay the right tax at the right time.
Yn ogystal â'n system dreth, rydym wedi parhau i wella'r ystod o wasanaethau cymorth a gynigiwn er mwyn ei gwneud yn haws i drethdalwyr a'u cynrychiolwyr dalu'r dreth gywir ar yr adeg iawn.