From the perspective of United States income tax law, I would absolutely agree with the opinion given by the other CPA with whom you spoke. A taxpayer filing a US tax return can claim mortgage interest and property taxes as itemized deductions on their first or second home, regardless of the country in which that home is located.
Thus, in theory, a US taxpayer could own a home in Washington, D.C., and another home in Dehli, India, and then deduct the property taxes and mortgage interest paid on both homes on their US income tax return. The tax code of the United States permits this.
However, with respect to the Indian tax code, I do not know the answer to that, and could not say. For your own protection, and to ensure that you remain in compliance with Indian tax law, you would be well-advised to check on this matter with either the Indian Ministry Of Finance / Department of Revenue, or an Indian tax professional, such as perhaps a Charted Accountant in India, or a tax lawyer based in India.
But, again, there is no problem with this from the perspective of the US.
Thank you for asking this important question.
