Changes in Indiana child support payments are only going to be made in circumstances where the court has held there has been a substantial change in condition and it's in the best interest of the child or children involved.
Deviation from the Indiana Child Support Guidelines also generally isn't done without good cause. Of course, there are always exceptions. Whether you're the one requesting the change or trying to fight it off, an experienced family law attorney can help.
The recent case of Bogner v. Bogner before the Court of Appeals of Indiana reveals how one such battle played out.