It is not possible to edit a reject once it has been created. Please cancel the supplier reject and raise a new one. If the supplier reject cannot be cancelled, please check the following:
It has not been posted into any accounting package.
It has not already been cancelled.
It has not been matched against an invoice.
It has no credit/invoice number.
If a supplier reject cannot be cancelled, you may need to cancel the related accounts package export and also cancel the related invoice.