We will only cancel registration once all taxable disposals have ended, including disposal of site restoration material and all tax that is due has been paid.
Dim ond ar ôl i'r holl warediadau trethadwy ddod i ben, gan gynnwys gwaredu deunydd adfer safle ac mae’r holl dreth sy’n daladwy wedi ei thalu y byddwn yn canslo cofrestriad.