Condition Description. Truncus arteriosus is an uncommon congenital heart defect where a baby is born with a single blood vessel (called a truncus) coming from the main pumping chambers of the heart (the ventricles) instead of two vessels (one from each ventricle).ondition Description. Truncus arteriosus is an uncommon congenital heart defect where a baby is born with a single blood vessel (called a truncus) coming from the main pumping chambers of the heart (the ventricles) instead of two vessels (one from each ventricle).
IRS Office Customer Service Phone Number Phone Number: 1 (800) 829-1040. Shortcut: N/A - Edit
Toll free business telephone assistance is available at 1-800-829-4933. The hours of operation for this number are also 7 am to 7 pm local time. Businesses that require assistance with E-services can contact the E-help Desk Monday-Friday from 6:30 am to 6:00 pm central standard time. The E-help Desk is staffed with IRS tax professionals who can typically handle inquiries involving E-services products. The toll-free number for this is 1-866-255-0654.