TAX & LICENSE / FEDERAL TAX SYSTEM
Louisiana IRS Offices
https://www.irs.gov/help/contact-my-local-office-in-louisiana
Mississippi IRS Offices
https://www.irs.gov/help/contact-my-local-office-in-mississippi
Internal Revenue Service
800-829-1040
https://www.irs.gov
Frequently Asked Questions
https://www.irs.gov/faqs
Tax Topics
https://www.irs.gov/taxtopics