Before you begin to home school, it is critical that you learn the laws governing home schooling in your state. The Home School Legal Defense Association (HSLDA) has a great map that links to each state. There are links to laws, organizations, cases, legislation and news stories concerning home schooling in that state.
The HSLDA is a wonderful resource for information on the legal implications of home schooling and keeping up with new home school legislation. They also advocate for their members.