Yr Awdurdod fydd yr adran anweinidogol gyntaf i gael ei chreu gan Lywodraeth Cymru. Dros y tair blynedd nesaf disgwylir iddo gasglu tua £1bn o refeniw o drethi, a fydd yn hanfodol i gyllido gwasanaethau cyhoeddus Cymru.
It will be the first non-ministerial government department created by the Welsh Government and, over the course of the next three years, it will collect around £1bn in tax revenues, which will be vital for the ongoing funding of public services in Wales.