Not to disagree with @Hal_Al but you may want to take a look at IRS Publication 350. Generally, Real estate taxes are only deductible by a taxpayer who pays the tax and is legally required to pay the taxes. I'm assuming the mortgage was taking out to purchase the home & the deed is in the daughter's name. If so, the father/mother will likely not be able to take the deduction.
Re the interest deduction, IRS Publication 936 states that you can only deduct mortgage interest if you are "legally liable" for the loan. It is not uncommon to assume that liability is determined by the name or names on the mortgage. However, according to Title 26 Code of Federal Regulations section 1.163-1(b), even a taxpayer not directly liable for a mortgage can deduct interest as long as he paid and has a legal interest in the home. This means that you can deduct interest you actually paid as long as you are on the mortgage or the deed.
Of course, it is possible I have a misunderstanding of your situation.
Hope this helps.
