I started a discussion about this a few months ago, but have received some additional information that I'd like to run past the folks here. I indicated that my parents had sold a house on August 31, 2009. Until August 1999, part of the residence was used for business purposes and deductions for the use were made on their income taxes.
The responders here pointed me to Section 1250 and Form 4797.
However, I recently had a discussion with their tax professional and their view was because my parents had used the house exclusively as their primary residence (no business or rental) since 1999, they satisfied the 2-out-of-5 year rule and that nothing special needed to be done on this year's taxes relating to the sale. The gain was way under the $500,000 allowable exclusion.
Any help in resolving all of this would be appreciated.