Are the property tax and interest on a mortgage jointly paid by our daughter who lives in it deductible?

[chu12]

Wife and I bought a condo and had our daughter's name on it also.  Some months she lacks the money to pay for it so I do. This is not a rental; we are helping her. Are the prop tax and interest we pay deductible?

[Bsch4477]

Read the discussion here. 

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-credits-deductions/deduct-mortgage-i...

[Hal_Al]

Q. Are the property tax and interest on a mortgage jointly paid by our daughter who lives in it deductible. Are the prop tax and interest we pay deductible?

A. Yes. 

You appear to meet the rules, which are:

1. You are legally obligated to pay it
2.  You actually pay it.

Real estate taxes are deductible on any property you own.  Mortgage interest  is only deductible on your primary residence and one "second home".  A home you own, that is occupied by family, qualifies as a second home.