Datganiad Ysgrifenedig: Cyfraddau Treth Incwm Cymru (WRIT) - Cyhoeddi Cytundeb Lefel Gwasanaeth ac Adroddiad Blynyddol CThEF (2023)
Written Statement: Welsh Rates of Income Tax (WRIT) - Publication of Service Level Agreement and HMRC Annual Report (2023)