Do I need to take all of the training to update for Retail Sales? November 10, 2021 15:14 Updated YES. As of October 25, 2021, you will no longer notice RS in new certificate numbers. Related articles How do I start my test? How long is the In-Class Training? Does Smart Serve expire? Is there an age restriction for taking the course? Do Liquor Delivery Employees need Smart Serve?