Advice on a Trust payment I received

Hi guys,
I receive Carers allowance for looking after my son, today I received a Trust payment from a former Employer and have been taxed on it .I’ve been told I can claim this back by ringing tax office as dont work.
I’ve been on hold with Tax office for an eternety…can anyone advise me if it will interfere with my carers allowance? Is it considered as an income?