If you are filing a current year Form 1065, mark the appropriate name change box on the form: Page 1, Line G, Box 3. If you've changed your legal or business name, you might need to notify the IRS or the Social Security Administration (SSA).Are you planning an IRS business name change? You may not need a new EIN. Learn how to change your business name with the IRS. 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. Write to the IRS to inform them of the name change. Use Form 8822-B to notify the Internal. Revenue Service if you changed your business mailing address, your business location, or the identity of your. This question is always asked in my comment feed but it's super complexed so I decided to share a video on this.