Court actions involving children and child support must be approved by the Prosecutor's Office, Division of Family Support. This page explains more about how this happens and what is needed by the state. Very Important if OSE or DSHS is involved in child support!
List of Pierce County approved providers for Mandatory Parenting Seminars.
Washington State Child Support On-Line Calculator While it isn't perfect and many factors can provide for deviations on the child support calculations, it does give a good idea of what child support will be based upon the income of the parties.