Before you begin business with an unknown group, review their information with the Better Business Bureau, http://www.bbb.org/

For tax related questions concerning working at home, the absolute best place to go is the IRS website.  I actually have found their website to be pretty user-friendly and helpful, http://www.irs.gov/

Starting or running your own business:  The U.S Small Business Association’s website provides great information on starting, maintaing, and growing your small business, www.sba.gov