How to apply for grants in US?

Go to http://grants.gov/ and follow the instructions. You will find that if you are a nonprofit, basic research or day, no grants for small business. Some cities offer grants to small businesses if they will locate in the center of town or want to update your store front, the effects of construction traffic in the center. Check with your municipality for details. Private foundations offer scholarships. You can get a list of most U.S. Foundations and private sources of grant in  

http://www.foundations.org/