snipped-for-privacy@comcast.net posted:
On the facts presented, the house in NH can reasonably be considered as a second home (as is a vacation or seaside home) and the taxes paid can be claimed on Schedule A.
If you ever do rent the property, however, previous years deductions of tax would possibly/probably be questioned.
On your second point, since you have no income from NH, it would be pointless to file a tax return. (Besides, isn't NH one of those states with no personal income tax? I believe they tax only interest and dividends of residents.)
Bill