HMRC will recharge for calls from someone asking about their Welsh taxpayer status, but not the Welsh taxpayer customer who is calling to change their name.
Bydd CThEF yn ailgodi tâl am alwadau gan rywun sy’n gofyn am ei statws trethdalwr Cymreig, ond nid y cwsmer sy’n drethdalwr Cymreig sy’n ffonio i newid ei enw.