The other attorneys have correctly answered your question. There is no need for you to change your organization's tax ID, even if its name changes, provided that you notify the IRS of the entity's new name. See http://www.irs.gov/Individuals/Business-Name-Ch.... Please be sure, however, to change the address of your organization either on its tax return for the very next tax period or by filing a change of address form with the IRS, Form 8822-B, Change of Address - Business (see attached link). Enjoy your new life in the Mile High State!