Ers hynny, rydym wedi gwneud llawer o waith gyda CThEM i ddeall yn well sut mae Treth Dir y Dreth Stamp a Threth Dirlenwi bresennol y DU yn gweithredu. Rydym hefyd wedi adolygu'n ofalus y mathau o systemau a gweithrediadau y gallai CThEM a Cyfoeth Naturiol Cymru eu cynnig, ac rydym wedi gwneud gwaith manwl gyda'r ddau sefydliad i gael mwy o eglurder ynghylch sut y byddent yn gallu darparu gwasanaethau i drethdalwyr Cymru.
Since then, we have undertaken a significant amount of work with HMRC to better understand how the current UK Stamp Duty Land Tax (SDLT) and Landfill Tax operate. We have also reviewed carefully the types of systems and operations potentially on offer from both HMRC and NRW, followed by detailed work with both organisations to further clarify how they would be able to provide services to Welsh taxpayers.