The CRA will be providing a new Tax Data Delivery (TDD) service for this filing season. This service will allow you to download significantly more information about your clients than Represent a Client does now. You will start the download like you currently do for Represent a Client.
For this season, you will be required to enter your clients SINs into a CRA webpage to initiate the download. Once verified, TaxCycle will handle downloading the data into your clients return. Naturally, slips data availability is dependent on when the issuer files them with the CRA.
This is expected to be available after February 9th 2015.