The Internal Revenue Code (IRC) allows an LLC to elect its tax status for income tax purposes. You should consult your financial or tax adviser about these “check-the-box” regulations and any changes. For income tax purposes, New York State law follows federal law. Additionally, New York state law (and certain other states’ laws) imposes a tax based on the number of members of the LLC. Also, depending on the nature of the business the limited liability company undertakes, the LLC may have to pay or collect sales taxes, employee withholding taxes and other taxes.
The LLC will need a taxpayer identification number (or an EIN). Here is the link to the IRS’ How to Apply for an EIN (with separate instructions for Corporations, International Businesses, Partnerships, and Small Business/Self-Employed). Your applying by telephone is sometimes easier than via the online method.
As a New York small business owner, you need to understand your New York State tax responsibilities (Recordkeeping, Hiring employees, Selling products or services, and other New York State taxes). The New York State Department of Taxation and Finance site has a lot of information for those starting or buying a business. Also, you should read the IRS’ “Publication 583 Starting a Business and Keeping Records” is available as a pdf download or viewable on the IRS web site.
Of course, it is best to discuss the above with your financial adviser or accountant along with a New York Small Business Lawyer (or corporate attorney).