Cafodd y prosiect arloesol hwn ei gyflawni o fewn naw mis ac, ar 1 Ebrill 2018, gweinyddodd Awdurdod Cyllid Cymru y trethi penodol cyntaf i Gymru am y tro cyntaf ers 800 mlynedd.
The innovative project was delivered within 9 months and, on the 1 April 2018, the WRA successfully administered the first specifically Welsh taxes for the first time in 800 years.