The taxpayer must pay the amount payable (including any penalties and interest) within 30 days beginning with the day on which the WRA assessment notice is issued.
Mae’n rhaid i’r trethdalwr dalu'r swm sy'n daladwy (gan gynnwys unrhyw gosbau a llog) o fewn 30 diwrnod gan ddechrau gyda’r diwrnod y cyhoeddwyd hysbysiad asesiad ACC.