When a postponement request relates to LDT, it also needs to specify the reasons why recovery of the amount (including any interest) would cause the person making the application financial hardship.
Gydag unrhyw gais am amrywiad, rhaid hefyd esbonio'r newid yn yr amgylchiadau sydd wedi arwain y trethdalwr i gredu y dylid newid, amrywio neu ddileu'r penderfyniad i ohirio.