1. www.ca.gov
If you will be conducting business in California, go this site to find out about types of business entities, forms, filing fees and more. If in other states, search for state business portal.
2. www.sba.gov
You'll get information on government regulations, funding sources as well as start-up guides.
3. www.census.gov
Here you will get statistics on industry and market.
4. www.irs.gov
Go to this site to learn about tax regulations that impact small businesses.
5. www.score.gov
Formerly, Service Corp of Retired Executives now called Counselors to America's Small Businesses. This is an organization of former business owners and executives who offer advice online.