It’s difficult to give you the who, what, where, when and how on a messageboard.
Asking for money legitimently to finance a movie is an extremely complicated matter. Assuming you aren’t just going to friends and family for a few thousand, but are asking for tens or even hundreds of thousands of dollars you’re going to need to protect yourself and the investors from fraud and mismanagment.
Weather you start an LLC or a limited or general partnership, you need a Federal ID, a bank account and a business license. And you really should hire the services of a lawyer and accountant. I’m sure some of you are thinking, “hey, I just wanna make a movie, I don’t really need all that business crap”
An investor won’t respond well to that. A legit one won’t, anyway. Especially if you don’t have a solid track record of finished movies.
The short version: You will need to offer shares in a limited partnership and this offering is regulated by the SEC and by “Blue Sky Laws”
Every state has its own securities laws, commonly known as "Blue Sky Laws" that are designed to protect investors against fraudulent sales practices and activities. While these laws can vary from state to state, most states laws typically require companies making small offerings to register their offerings before they can be sold in a particular state.
If any of the security laws are violated, the investor can get a complete refund and can bring criminal charges against you.
Check
Regulation D for more info.