Company A is required to make a return for the period 1 April 2018 to 30 to June 2018 on or before the filing date of 31 July 2018, but fails to do so.
Mae’n rhaid i Gwmni A ddychwelyd ffurflen dreth ar gyfer y cyfnod 1 Ebrill 2018 i 30 Mehefin 2018 ar y dyddiad ffeilio, sef 31 Gorffennaf 2018, neu cyn hynny, ond nid yw’n gwneud hynny.