If you have a gain on the sale, you would be required to report. You are correct that timeshares are "Right to Use" but they are considered an Ownership Interest. In TurboTax, you can enter as an Investment sale and include your basis to determine if you have a taxable gain. If there is a taxable gain, it is reported on your Schedule D. If you have a loss, it is probably not deductible because in most cases, it is considered a loss on the sale of personal property.