A license to make a living as a professional photographer does not necessarily come in the form of an official document. For many long-time photographers, their photography license is metaphorical, obtained by building and maintaining a good reputation for quality work. In nearly all cases, your "license to work" is your exemplary photography.
However, it's good for professional photographers who work full-time or operate a photography business on the side to obtain a license for tax purposes. Here's how to get what you need to launch your photography business.
Enroll in a photography school to obtain a degree in the craft or take photography classes to establish and sharpen your photography skills. Going to school for photography can only help you, as it allows you to build a portfolio of photographs and gain valuable experience.
Go to your town clerk's office and obtain a license to operate a business. Ask the clerk for the license form and fill out the necessary information to obtain a tax identification number for the purpose of filing taxes for your photography business.
Begin to build your photography business by word of mouth. Set up a website where you can post examples of your work and list an email address and phone number where people can contact you.
If you specialize in a specific type of photography, register with an association or organization of those photographers. Membership in these groups is often only bestowed to those with exceptional talent, reputation and experience.