I live in a retirement senior care facility who also provide medical services. HOW DO i DETEERMINE THE DEDUCTIBLE AMOUNT FOR MY INCOME TAX?

The facility is supposed to be able to provide you with that information.They should provide a breakdown at the least. Often, they will give a percentage.

What Are Medical Expenses? Medical expenses are the costs of diagnosis, cure, mitigation, treatment, or prevention of disease, and for the purpose of affecting any part or function of the body. These expenses include payments for legal medical services rendered by physicians, surgeons, dentists, and other medical practitioners. They include the costs of equipment, supplies, and diagnostic devices needed for these purposes. Medical care expenses must be primarily to alleviate or prevent a physical or mental disability or illness. They don't include expenses that are merely beneficial to general health, such as vitamins or a vacation. Medical expenses include the premiums you pay for insurance that covers the expenses of medical care, and the amounts you pay for transportation to get medical care. Medical expenses also include amounts paid for qualified long-term care services and limited amounts paid for any qualified long-term care insurance contract.

From:  About Publication 502, Medical and Dental Expenses