This Is Not What I Signed Up For by RandomlyCostumed on DeviantArt

You use not, usually in the form n't, in questions which imply that someone should have done something, or to express surprise that something is not the case.. Do you like drinking cod liver oil?

In this case not cannot appear after the verb;. Some authorities recommend placing it before to to avoid a split infinitive, but for most speakers the forms not to do and to not do are more or less.