If you are using a private delivery service such as UPS or FedEx then use this address for mailing the amended tax return to Fresno -
Fresno - Internal Revenue Submission Processing Center
5045 East Butler Avenue,
Fresno, CA 93727
If you are NOT using a private delivery service then use the address as shown on this IRS website for your state when mailing a Form 1040X - https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
