I received a 1099-a. box 4 is more than box 2. do I owe the differnce in taxes. When I purchased the house in 2006 at the height of the market the fmv came in at 156,000 , I paid 146,000. Box 2 now states 143,000 / box 4 now states 153,000. What is my situation in this matter. Any help would be greatly appreciated.