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
IRS Tax Help Customer Service Phone Number: (800) 829-1040. 1  Whenever you make a call to this number at very first the automated system will responses you as welcome to the Internal Revenue Service. If you are compatible in English just press 1. If you are calling for to know information about payment card and third party network transactions reporting on form 1099K press 7.