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
To contact the IRS, call: 1  Customer service -- 800-829-1040. 2  Lost IRS check -- 800-829-1954. 3  Refund status -- 800-829-4477.  Forms and publications -- 800-829- 1 3676. Questions about refunds and offsets to IRS liabilities -- 800-829-1954.  Taxpayer advocate service -- 877-777-4778.