There are 2 ways to add tags in AWeber.
Type direct into AWeber account.
You will need to go to your subscriber list and select a name that is confirmed and subscribed.
Opening ANY subscribed contact will give you a box to add tags. Creating tags here will add them for use in any contact record. If you don't want that contact to keep those tags you can delete them.
Then proceed back to EasyWebinar and add that tag into your integration list EXACTLY as you typed it.
Capitals do matter. These tags below are 2 different tags.
Another way to add tags into AWeber is to just add them in EasyWebinar.
Typing into the tag box and saving will add that tag to the contact record in AWeber when they register with EasyWebinar.