Divorced parents often ask questions about whether they have a duty to advise their ex-spouse of changes in income that might affect child support. While there is no such requirement in Missouri, there is a duty to notify in Kansas. Kansas Judges are required to follow the Kansas Child Support Guidelines, which direct how child support should be calculated. The Guidelines also direct when and what factors make child support modification appropriate. According to the Guidelines, either a material change in circumstances needs to be shown or the passage of three years is required for a child support order [...]