Learn how to change your business name with the IRS. If you are filing a current year Form 1065, mark the appropriate name change box on the form: Page 1, Line G, Box 3.In order to change your LLC name with the IRS, you'll need to mail them a letter and show proof of the state approving your LLC name change. Are you planning an IRS business name change? You may not need a new EIN. The first step is to file a form called the Articles of Amendment with the Department of State and wait for it to be approved. Follow our stepbystep guide covering how to properly amend your business name, to stay compliant with all state and local laws. How do I fill this out? To fill out this form, you need to provide the old and new company names, your federal identification number, and contact details. How do I fill this out?