Divorced in 2002 in IL, divorce papers say payment of $100 wk based on $500 mo. income. He will not provide me with his yearly income and child support has not been modified previously. I know he is not paying me 20% but haven't went to court due to trying to keep peace and our son out of it. He has threatening to sue me for custody if I go to court for more support. My son is now 16 and does not want to live with my ex and change high schools.