Dear Hal_AI,
I have the same question - can I claim my not-legally-married wife's mortgage interest, but we have a slightly different scenario.
We've been living with each other for the past 2 years. We hope you can help to answer our question as I'm filing my 2020 Tax Return with the extended filing date of May 17 approaches. We are both divorced, retired, own our own homes, and grown children who have moved out. We both still have our own mortgages to pay. I moved in and live with my "wife" in her house and rented out my home as that is the most economical sense for our situation. I have been paying for both of our mortgages and all living expenses. From your comments, she meets all of the 6 IRS criteria to be my dependent. Can I claim her mortgage interest and all of her expenses to reduce our taxes? Thank you so much in advance for your advice/help.
