How do I get my child support increased in Florida? The child support will be increased based upon your filing a supplemental petition for modification of the final judgment. That is what begins the child support modification action for an increase. Posted in Child Support Law, Legal FAQ Videos and tagged Child Support. Carolyn S. Zisser Highly regarded in marital and family law, Carolyn S. Zisser is a well-respected lecturer and author on family law subjects for the American Bar Association, Florida Bar, Jacksonville Bar Association and private legal seminar companies.