Sole Proprietorship. Write to us at the address where you filed your return, informing the Internal Revenue Service (IRS) of the name change.Business name change. 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. An exempt organization that has changed its name generally must report the change on its next annual return (such as Form 990 or 990EZ). To do so, Virginia business entities can file Articles of Amendment – Name Change. 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. Note: The ID and PIN can be found in the.