Since you have your EIN, then you are officially recognized by the IRS. If your paperwork shows you are claiming tax exempt status and you act in that manner, then yes, it means you are incorporated. But you need to keep a separate set of books and act like an entity. Get a good accountant and set up your financial books properly, It is not easy to maintain the proper records, so learn to do this right, in the beginning. Congrats - hope you NFP is very successful.