Since 2004, the IRS has administratively made S elections for limited liability companies (LLCs) very easy. An LLC that is otherwise eligible to be an S corporation that is classified as a partnership or a disregarded entity can simultaneously elect to be classified as both a corporation and an S corporation by timely filing Form 2553, Election by a Small Business Corporation, without the need to also file Form 8832, Entity Classification Election. The Treasury regulations treat the "one-stop-shop" rule as a "deemed election" under the entity classification regulations.