COVID - 19 Info from IRS Click HERE to learn more about Economic Impact Payments from the IRS. P.O. Box 1051 - 2845 South Frontage Road , Columbus, Mississippi 39703 (662) 327-4121 (662) 327-8114 (TTD) LISTED BELOW ARE THE ONLY COUNTIES WE SERVE Carroll, Choctaw, Clay, Grenada, Lowndes, Montgomery, Oktibbeha, Webster, Winston Counties - Mississippi