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? How do I register for an Individual account? When does my Smart Serve certificate expire? I passed, how long does it take to get my certificate?