If you are filing a current year Form 1065, mark the appropriate name change box on the form: Page 1, Line G, Box 3. Learn how to change your business name with the IRS.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. Before you complete this petition, read the Instructions for Filing a Petition for Change of Name (form NC100INFO). Are you planning an IRS business name change? You may not need a new EIN. If you've changed your legal or business name, you might need to notify the IRS or the Social Security Administration (SSA). A letter requesting the contact name change for your business account. Where can I get a building permit, or find out information about development services?