Licensed real estate agents: Real estate tax tips Employee or self-employed? Sale of residence: Real estate tax tips Do you qualify to exclude your gain? Real estate (taxes, mortgage interest, points, other property expenses) This frequently asked question and answer page provides information on allowable deductions for mortgage interest on second mortgages, home equity lines of credit, property taxes, points and more. Environmental cleanup costs This deduction provides businesses with an incentive to clean up certain sites that are contaminated with hazardous substances. Refer to the section on Environmental Cleanup Costs in Publication 535, Business Expenses. Rental income and expenses: Real estate tax tips When are you required to report rental income and expenses? Rehabilitation Credit The rehabilitation credit is a tax incentive to rehabilitate historic buildings. Installment sales: Real estate tax tips Time is on your side. Involuntary conversions: Real estate tax tips Destroyed, stolen, or condemned property? Like-kind exchanges: Real estate tax tips Defer your gain under Internal Revenue Code Section 1031. Related topic Real estate tax center