This appears to be a legitimate IRS location. See this answer from a year ago: https://ttlc.intuit.com/questions/3269177-i-just-received-a-suspicious-mailing-claiming-to-be-the-ir...
Also see this IRS pub with the location shown as a Submission Processing Center: https://www.irs.gov/uac/submission-processing-center-street-addresses-for-private-delivery-service-p...
