| Note that an LLC is a legal entity, not a tax entity, and you must choose whether to report as a sole propeitorship (Schedule C), a partnership (Form 1065) or a subchapter-S corporation (Form 1120S).
If you expect to be an independent contractor for only a few months, setting up an LLC or a S corporation is not, in my opinion, worth the effort. You can report your income and expenses on Schedule C and calculate your self-employment tax (the self-employed's equivalent of Social Security and Medicare taxes) on Schedule SE.
If you do receive income as an independent contractor, you can, for the first year only, avoid making quarterly estimated payments, though you should put aside at least 25% of each paycheck to cover your eventual tax liability.
If the independent contract status extends beyond 2009, you would need to make quarterly estimated payments to both the IRS and the state of New York, with the first payment due on 15 April 2010. |