1. Self-employment can include work in addition to your regular full-time business activities, such as part-time work you do at home or in addition to your regular job.

2. If you are self-employed you generally have to pay self-employment tax as well as income tax. Self-employment tax is a Social Security and Medicare tax primarily for individuals who work for themselves. It is similar to the Social Security and Medicare taxes withheld from the pay of most wage earners. You figure …