Prif ddiben y Gyllideb Atodol hon yw dangos y newidiadau cyllidebol ers Cyllideb Derfynol 2020-21 a gyhoeddwyd gan Lywodraeth Cymru ym mis Mawrth 2020.
The main purpose of this Supplementary Budget is to reflect the budgetary changes since the Final Budget 2020-21 published by the Welsh Government in March 2020.