Welcome to TASC, Inc. of Illinois We help people overcome drug problems, other health conditions, and arrest histories. Through our advocacy and case management services, we show our clients that their past isn?t necessarily the path of their future, and that they can succeed in changing their lives.Throughout Illinois, we work with men, women, and youth who are involved in courts, prisons, public health, and child welfare systems. We connect these government systems to services in the community.