When opening helm-find-files via C-x C-f, I can type to narrow the list of files to the desired one.
When I want to create a new file, and that file name matches an existing one, I am stuck:
Find Files (C-l: Go up one level) pageBanners.gql New file or directory [+] banners.gql *helm find files* L1 [1 File(s)] C-h m:Help TAB:Act RET/f1..f12:NthAct C-!:Tog.suspend C-h c:Conf Find files or url: /home/cweiske/tmp/banners.gql
Solution: Press C-v to go down to the "New file or directory" part of the window. M-v to go back.
Source: