For the purpose of computing the deductin for a qualified residience interest. Could my principal residence and one other residence owned by me or by my wife, be considered as a qualified residence or not?

Mathandler1 - since you are taking an income tax accounting course you should not just post questions straight out of you're homework assignment and expect us to answer them for you - pleases try and answer some of the "hypothetical" questions you've been posting lately on your own. I bet the answer to this one is right there in your text book. If you would like confirmation that you have the right answer, please tell us what you think the answer is and then I'm sure someone will be glad to help check it for you.

See my post about learning.

This is not homework assignment... daily DQs (discussion questions). Thanks!

The textbook is not friendly user when it comes to answering these DQ's

Still, you do not learn if the answers are GIVEN to you!

If your text is unclear or doesn't provide a direct answer, try the IRS web site: Internal Revenue Service - they have a search engine, and if you enter "home mortgage deduction" it takes you to a list of relevant documents, including Pub 936, "Home Mortgage Interest Deduction." Open that document up, and you'll soon find your answer!

Ebaines has a point.

When we post, we apply opinion and experience, but our answers are NOT guaranteed.

Research at the source (the IRC and IRS pubs) will serve you better!