Whats strange that if you fly in/out of Terminal 1 from international you have a loooong form to fill in for immigration, but if you go into Terminal 3 from international its the new small form. If you try to use the T3 form in T1 they get confused!
And for putting where you stay, doesn't matter what country I goto I usually just write the Hilton whether i'm going there or not as i'm too lazy to fill in details.