Us Internal Revenue Service 7201 W Interstate 40 Amarillo, TX 79106 Phone : (806) 359-2160 Business Category Public Finance Taxation & Monetary Policy Internal Revenue Service--local Area Office Amarillo, TX 79101 Phone : (806) 359-2160 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--internal Revenue Service, Local Area Office 7201 W Interstate 40 Amarillo, TX 79106 Phone : (806) 359-2160 Business Category Government Offices-Federal Government Offices & Public Schools