Should I attach a copy of my WHOLE federal return to my to be mailed California return? The California return already has several pages from 1040 (interests, etc.)

I am asking this because the whole federal return is 20 pages, and the CA state return has only a couple of pages from the form 1040 at the end. Is this enough for the " Attach your federal return...", or I really need to attach all 20 pages for the mail in CA return?

Thanks,

L.