Maybe. Mortgage interest is deductible as part of what is called "Itemized Deductions". You automatically get a set deduction, called the "Standard Deduction". In order to see a benefit from your mortgage interest your total Itemized Deductions would have to be more than your Standard Deduction. Just having mortgage interest alone is not enough to create a tax benefit for you.
For more information on the Standard and Itemized Deductions please see the following article. Also please note that the article has links at the bottom to several other helpful articles on this topic.
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