By: Margaret Heidenry (realtor.com)Capital gains tax is the income tax you pay on gains from selling capital assets—including real estate. So if you have sold or are selling a house, what does this mean for you?If you sell your home for more than what you paid for it, that’s good news. The downside, however, is that you probably have a capital gain. And you may have to pay taxes on your capital gain in...