Sole Proprietorship. Write to us at the address where you filed your return, informing the Internal Revenue Service (IRS) of the name change.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. If you've changed your legal or business name, you might need to notify the IRS or the Social Security Administration (SSA). 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. As an adult wishing to change your name, you must have two (2) Affidavits of. Character from RESIDENTS OF MECKLENBURG COUNTY who ARE NOT. There is NO fee to apply for a certificate of registration in North Carolina.