Mae gan Gymru bellach bwerau i gasglu a rheoli’r trethi sydd wedi’u datganoli'n llwyr i Gymru, ar ôl i Ddeddf Casglu a Rheoli Trethi (Cymru) 2016 gael ei chyflwyno.
Wales now has the powers to collect and manage fully-devolved Welsh taxes, following the introduction of the Tax Collection and Management (Wales) Act 2016.