I love that you're looking to take advantage of QuickBooks Labs in QuickBooks Self-Employed. It's a great opportunity to see some new features while they're still in beta and test them out to see how you like them and provide us with feedback. I can point you to where you can find this in QuickBooks Self-Employed Canada.
QuickBooks Labs is an option that's automatically available in QuickBooks Self-Employed accounts, meaning it doesn't have to be enabled. What you'd enable are the features listed in QuickBooks Labs that you're interested in trying out. With that in mind, the first step to finding QuickBooks Labs is to log into QuickBooks Self-Employed using a browser. Here's how to do that and find QuickBooks Labs.