Rwyf wedi siarad gyda swyddogion CThEM ac wedi gofyn am ragor o fanylion ynglŷn â’r hyn a achosodd y broblem hon, pa mor eang ydyw a nifer y trethdalwyr a effeithiwyd ganddi. Rwyf wedi gofyn hefyd am sicrhad ynglŷn â’r camau gweithredu sy’n cael eu cymryd i gywiro’r mater. Mae Jim Harra, Is-ysgrifennydd Parhaol CThEM, wedi ysgrifennu ataf heddiw i gadarnhau sut mae CThEM yn ymateb a beth yw eu cynlluniau i gywiro a monitro’r sefyllfa.
I have spoken to HMRC officials and have asked for further details on the cause of the issue, its extent and the numbers of taxpayers affected and sought assurances on the action being taken to rectify the problem. Jim Harra, the Second Permanent Secretary at HMRC has today written to me to confirm HMRC’s response and plans for correcting and monitoring the situation looking ahead.