What they mean by that is that you need to use a number, like your social security number. If your business will only be part-time part of your income, I would hold off on applying for corporate status. With that comes a lot of filings and headaches. Once you're a corporation, you have franchise tax filings, which in some states have a minimum tax of $350.

Obviously, it's your company so you can do what you choose with it. I just want to make sure your completely informed of the options and results available to you.

Good luck.