If, during the 5-year period ending on the date of sale, you owned the home for at least 2 years and lived in it as your main home for at least 2 years, you can exclude up to the maximum dollar limit. However, you cannot exclude the portion of the gain equal to depreciation allowed or allowable for periods after May 6, 1997. This gain is reported on Form 4797 (PDF), Sale of Business Property. If you can show by adequate records or other evidence that the depreciation allowed was less that the amount allowable, the amount you cannot exclude is the amount allowed. Refer to Publication 523, Selling Your Home, and Form 4797 (PDF), Sale of Business Property, for specifics on calculating and reporting the amount of gain.

References:

• Publication 527, Residential Rental Property