Data are collated into an electronic return and submitted to the Welsh Government through DEWi, a secure online data transfer system developed by the Welsh Government.
Mae'r data'n cael eu cynnwys mewn taenlen electronig a'u cyflwyno i Lywodraeth Cymru drwy DEWi – system ar-lein ddiogel i drosglwyddo data a ddatblygwyd gan Lywodraeth Cymru.