Bydd Cyllideb 2019-20 yn cynnwys, am y tro cyntaf, refeniw trethi o gyfraddau treth incwm Cymru, sydd i’w cyflwyno ym mis Ebrill 2019.
The 2019-20 Budget will, for the first time, include tax revenues from the Welsh rates of income tax, which are introduced in April 2019.