Call 612-348-3593 and leave your name and address. We will mail you an application packet.You may also call the Payment Information Line at (651) 431-4340 or (800) 657-3512. What is income withholding and how does it work? Automatic income withholding means the child support amount is taken out of a parent's paycheck. On fullservice cases, the child support office identifies the parent's employer or payoroffunds and sends a notice to withhold support. Fill out Form 8857, Request for Innocent Spouse Relief.