These Client Data System forms must be used for all Client Data System transactions with transaction dates on or after April 1, 2017. The Monthly Service Delivery form must be used beginning with the April 2017 report that is due by May 10, 2017. All Client Data System transactions with transaction dates prior to April 1, 2017 must use the previous forms located in the other tabs in this region regardless of the date they are entered in the system.