You find the code by logging into the dashboard for your account and navigate to Settings -> Tracking Script as shown below.
To learn more about how Google Tag Manager works, check out their site here.
If you get stuck at any point, give one of our team members a call – we’ll be happy to guide you through the process.
Advanced: If you are using RequireJS
Note: Once you have pasted it into your HTML template, you should replace YOUR_PARTNER_ID with your own Hello Retail partner ID. You can find your Hello Retail partner ID by logging into your admin account.