You need to produce summaries for the following Tax Slips: RL-24 for the parents (provincial), RL-1 (provincial) and T4 (federal) for the employees, RL-27 (provincial) and T4A (federal) for HCPs (coordinating offices only). Only the Federal Tax Receipts for the parents are not accompanied by a summary.
To enquire about formats to use to send your summaries to the government, refer yourself to the documentation available using the following links:
T4 Summary (federal)
T4A Summary (federal)