The Internal Revenue Service provides information on a variety of tax issues in its publication series. These publications can be found on the IRS World Wide Web site (www.irs.gov/formspubs/index.html). Go to the IRS World Wide Web site and find any publications that contain information on the sale of a principal residence. Describe the process you used to obtain this information and provide the title(s) of the publica- tion(s) that contain relevant information.