First, thanks to everyone in this group. I posted a related question some months ago and this was the only place I got useful, accurate information. An accountant referred by my company's EAP was useless, as was the IRS.
Assume that I marry my Canadian girlfriend, but that for a while she remains in Canada and I remain in the USA.
In general, as best I can tell, we would get a credit on our USA joint tax return for taxes she pays to Canada, and in Canada all taxes are individual, so I would not have to file there.
So here's my question.
What if we buy a home in Canada? It would not be my principal residence, but it would be hers. If I can show that I paid the mortgage interest and property taxes, can I deduct them on my USA return?