I co-signed a mortgage for my daughter to purchase an investment property in another state. How do I deduct the travel expenses to attend the closing

I don't think you can deduct that.  Unless she pays  you as a independent contractor for it.  

@vmd I agree with @VolvoGirl that these expenses are not deductible. you signed on the mortgage but don't own the property itself. 

Thank you.   That was my belief, too.  I did have an interesting visit to a city I was not familiar with.

Thank you