You will claim that you are involuntarily separated (that is, you are living apart but not due to a breakdown of the relationship). That way you will be able to claim the rent or property tax for your home, and your husband will be able to claim the rent paid for the nursing home, towards each of your Trillium benefits. As to the medical, presuming that your husband has the Disability Tax Credit on file with CRA, then yes, you can elect to claim the nursing home cost as part of the medical expense, and yes you can claim those on your tax return.