How do I finalize paying child support?

Is this your only or youngest child, i.e. last of all of your children emancipate?  Was the support order entered after July 1, 1997?  If so, child support terminates automatically, without further action.  If you have other children for whom you owe support, child support does not terminate automatically.  Instead, you must file to modify and recalculate the total payment based on current circumstances, including your current income, ex's income, and the fact that you are now paying support for 1 less child.  Be prepared - this may or may not result in a lower payment depending on the circumstances.  See C.R.S. 14-10-115(13).