I would also look into the requirements of your state (search for your secretary of state's website) and your county (call your county clerks office). Or, contact your local chamber of commerce to see what they suggest.

Hi hopelauren, It sounds like your hobby has turned into a business.The IRS suggests answering 8 questions to check if your hobby is a business: Is the purpose of your activity to make a profit? Generally, your activity is considered a business if it is carried on with the reasonable expectation of earning a profit. Do you participate in your activity just for fun? Hobbies - also called not-for-profit activities - are those activities that are not pursued for profit. Do you depend on income from the activity? If so, your activity is likely considered a business. Have you changed methods of operation to improve profitability? If so, your hobby may actually be a business. Do you have the knowledge needed to carry on the activity as a successful business? People who carry out hobbies just for fun, often don't have the business acumen to turn their not-for-profit activity into a profitable business venture. Have you made a profit in similar activities in the past? This may indicate your activity is a business rather than a not-for-profit hobby. An activity is presumed carried on for profit if it makes a profit in at least three of the last five tax years, including the current year - or at least two of the last seven years for activities that consist primarily of breeding, showing, training or racing horses. Does the activity make a profit in some years? Even if your activity does not make a profit every year, it still may be considered a business. Do you expect to make a profit in the future from the appreciation of assets used in the activity? This indicates your activity may be a business rather than a hobby. You can read more about the tax implications for businesses and hobbies here. http://www.irs.gov/newsroom/article/0,,id=169490,00.html Use the Licenses and Permits Tool to see which ones you need to apply for. If you plan to start a business, take a look at the requirements to start a business in your state here. Please feel to post additional questions and let us know how your business goes!

Possibly some public liability insurance in case you cause an accident while doing a shoot would be sensible.