What legal structure would a photography business fall under? What legal documents will i need as a photographer?

I would never advise a client to operate a business as a sole proprietorship, since it provides no liability protection. It is relatively simple and not expensive to form (and operate) an LLC, and I would strongly recommend you do so.    You can reach Dave Rich at (303) 886-2516 or dave@flatironlegal.com. Dave Rich is an attorney licensed in Colorado. Answering your questions does not create an attorney-client relationship between us. You should speak with an attorney to whom you have provided all the facts in your case, before you take steps that may impact your legal rights. I am not obligated to answer subsequent emails or phone calls unless you have hired me. I wish you the best of luck with your situation.