Depending on elections made by the LLC and the number of members, the IRS will treat an LLC as either a corporation, partnership, or as part of the LLC’s owner’s tax return (a “disregarded entity”). Specifically, a domestic LLC with at least two members is classified as a partnership for federal income tax purposes unless it files Form 8832 and affirmatively elects to be treated as a corporation. For income tax purposes, an LLC with only one member is treated as an entity disregarded as separate from its owner, unless it files Form 8832 and elects to be treated as a corporation. However, for purposes of employment tax and certain excise taxes, an LLC with only one member is still considered a separate entity.
Get an Employer Identification Number from the IRS. If your LLC has more than one member, you will need this number so your LLC can pay federal and state taxes properly, hire employees, and open a company bank account. You can apply for this number: (1) online; (2) by contacting the IRS at (800) 829-4933; or (3) by completing and mailing in Form SS-4 to the address listed on the form.
Indicate your LLC's initial registered agent and registered office. State law requires your LLC to have a registered agent and a registered office in Wisconsin on whom legal process can be served and to whom official documents can be sent. Your registered agent must be located at the registered office, which must be in Wisconsin and represent the physical business address of your registered agent.