Those tabs (for Apple Music, Your Library, and iTunes Store) as shown in ed2345's reply are NOT in my 'Music' formerly known as "iTunes". I am having the same problem that I am wanting to search for something in the Store and as soon as even click on the search field it will ONLY search my library, and there is NO way to select 'store' after I've typed in the search field! It only finds things that are already in my library! Is this to punish me for not choosing to subscribe to Apple Music because I don't want to LOSE all the music that I have CREATED (I'm a music producer, hello!)???