As I recall, when you list your Community College classes, there is a box "transcript available". That may be generating the prompt asking for a copy of the transcript. In my D's case, the class was taught as a HS class by the CC. Thus she could leave the box blank. If the class was a High School recognized class (either offered as a class by the HS, or an Options type class), then I think you can go either way. If you took it independent of your HS, then I think you need to have the Transcript sent.
For State Universities (that are not common app) it is standard operating procedure that they say they want to see the community college transcript. Whether they actually care or not if it is sent, I have no idea. My D ended up having them sent anyway.
For Common App schools, read each school's website carefully on whether they require the CC transcript. Most schools are silent, and as long as the classes are reported on your HS transcript, you should be ok without sending it.
Obviously, if you want college credit for the class, you will need to have the transcript sent to the school you enroll in.