Dydy'r dudalen rydych chi'n chwilio amdani ddim ar gael mwyach

Mae'r wybodaeth ar y dudalen hon wedi'i thynnu am ei bod wedi'i chyhoeddi ar gam.

This translation is no longer available. You can find the original version of this content at https://www.gov.uk/guidance/what-will-happen-if-you-do-not-pay-your-tax-bill