Day 2 of Grant Thorntons Top 10 Year-End Tax Planning Tips you shouldn't ignore.
Document Your Business Activities
You may not need to pay a 3.8 percent Medicare tax on your business income if you participate in the business enough so that you are not considered a “passive investor.” Participation is almost any work performed in a business as an owner, manager or employee as long as it is not an investor activity. Even so, you must document your activities, and the IRS will not let you make ballpark estimates after the fact. Make sure you document the hours you’re spending with calendar and appointment books, emails and narrative summaries.