When filing an amended North Carolina individual income tax return, fill in the "Amended Return" circle located at the top right of Form D-400. Tax Assessment Example.Contact Information. You can now file Form 1040X electronically with tax filing software to amend your Form 1040, 1040SR, or 1040NR for the current or two prior tax periods. Use these instructions and the April 2024 revision of Form 941-X for all years for which the period of limitations on corrections hasn't expired. To change your address with the IRS, you may complete a Form 8822, Change of Address (For Individual, Gift, Estate, or GenerationSkipping Transfer Tax Returns) The IRS asks that you send a letter, on company letterhead (if available) providing the name and Social Security Number of the owner(s) of the LLC. 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.