IRS Taxpayer Assistance Center Office 10 months ago ID: #788814 Listed In : Government Offices 825 E. Rundberg Ln. Austin, TX 78753 (512) 499-5127 Business Description Call for Appointment: (844) 545-5640 Business Hours Monday : 08:30 - 16:30Tuesday : 08:30 - 16:30Wednesday : 08:30 - 16:30Thursday : 08:30 - 16:30Friday : 08:30 - 16:03Saturday - ClosedSunday - Closed Reviews & Ratings Write a Review No Review. Please login / register to add your review.