Mae Awdurdod Cyllid Cymru (ACC) wedi cael ei sefydlu i gasglu a rheoli Treth Trafodiadau Tir - gan ddisodli Treth Dir y Dreth Stamp - a’r Dreth Gwarediadau Tirlenwi yng Nghymru o fis Ebrill 2018 ymlaen. Y trethi hyn fydd y rhai cyntaf i gael eu cyflwyno yng Nghymru ers tua 800 o flynyddoedd.
The Welsh Revenue Authority (WRA) has been established to collect and manage Land Transaction Tax - replacing Stamp Duty Land Tax - and Landfill Disposals Tax in Wales from April 2018. The taxes will be the first to be introduced in Wales for around 800 years.