The document discusses what qualifies as a second home for tax deduction purposes. It notes that the IRS allows taxpayers to deduct mortgage interest on up to two properties. To qualify as a second home, a property must have sleeping space, a toilet, and a place to cook. Additionally, the second home must be at least 50 miles from the primary residence. The document also states that you can rent out a second home and still claim deductions as long as you use it for at least 14 days or 10% of the rental period each year.