If you are just getting started on your home schooling journey, the internet is a great resource for information. It may be "Wonderland", but it is your responsibility as a parent to know what you are legally bound to do and teach for your child if you choose to homeschool in your state. Every state is different. A great website to start at if you are just getting started is: http://www.hslda.org/ This is the home school legal defense association. On their home page, on the right is a link called "in your state". You can click this link to find your state and learn the legal homeschooling options and requirements for the state you live.
TIP: Some states require a good deal of documentation, others....not so much. If you are homeschooling a child with special needs I recommend doing more than the minimum amount required. This need not be cumbersome but can include attendance record, copies of outside evaluations done or therapies performed (speech, OT, PT, etc). I like to do a yearly portfolio that also includes descriptions/photos of field trips, family vacations and community experiences. Besides being a great memento of your child's homeschool year they are very helpful if your child transfers back into a public/private school if/when your homeschool journey ends!