To rate a plugin in CodeCanyon first you need to be logged in with your envato account, then you need to follow the next steps:
1. Go to your downloads section under your profile, or go to this link: https://codecanyon.net/downloads
2. Search the plugin that you want to rate and you will find under the Download button , the rating widget.
That’s it. If you have more questions don’t hesitate to contact us.