If, as a result of a correction, an additional amount of tax is payable, the taxpayer must pay this within 30 days of the notice of correction being issued.
O ganlyniad i gywiriad, os y bydd angen talu swm ychwanegol o dreth, bydd yn rhaid i’r trethdalwr dalu hyn o fewn 30 diwrnod i ddyroddi’r hysbysiad cywiro.