Two quick thoughts. Firstly where are you based ? Secondly have you started the actual application process for Fair Deal ?
If you are in the west of the country I can recommend a good accountant. If you have the application process already completed you will have an idea of the assets and accounts etc so you have the majority of the info needed. What you need to be careful of is the income from any letting of property and the associated possible tax liability, also the insurance cover will change. I have been down that road and it's not as bad as it seems at first,just tricky.