Yes. I am not a tax professional, but my understanding is that business entities operating in the US are <i>required</i> to have a business tax ID number, called an Employer Identification Number (EIN).<p>You may find better and more detailed answers at these links to the US Internal Revenue Service (IRS)...<p><a href="http://www.irs.gov/businesses/international/index.html" rel="nofollow">http://www.irs.gov/businesses/international/index.html</a><p>or<p><a href="http://www.irs.gov/businesses/small/article/0,,id=98350,00.html" rel="nofollow">http://www.irs.gov/businesses/small/article/0,,id=98350,00.h...</a><p>As for applying for an EIN, that can be accomplished online, here...<p><a href="http://www.irs.gov/businesses/small/article/0,,id=102767,00.html" rel="nofollow">http://www.irs.gov/businesses/small/article/0,,id=102767,00....</a>