Gerry
We can't give detailed financial advice on the forum, if you need this then you should get face to face advice, do an internet search for "welfare advice" with your postcode, town or county.
If you close your Cares Allowance claim then you will lose the Carers Addition from your Pension Credit.
If this then results in the amount of Pension Credit being less than your income (e.g. pensions, etc.) then your PC will also stop, this may also affect Housing Benefit. If your PC remains in payment then I would expect your HB to do so as well. In either case you need to inform your Local Authority of the Change.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
