The tax ID number depends on a couple of choices you make. If you have employees then you probably need one, if you don't have employees, then you probably don't. The best bet is to check with a CPA or attorney who's local. It shouldn't cost that much money and it will be worth it to you. -- Tim
If you're an entrepreneur, it's critical to find a tax preparer who understands the tax implications of owning a small business as well as your particular needs in order to establish a beneficial relationship.