@jflorez007 I am not clear what exactly you mean by "append". Most Learning Subscriptions come with RH199. The exception is the Developer subscription. If you have this one, unfortunately you are not able to simply add this course to your subscirption. You will either need to purchase the a la carte version of the course, or upgrade to a different subscription tier. If I misunderstood your question please direct message me here in the community and we can dig into your account and username enrollments.