According to Wikipedia the Turkish /n/ is dental, but it doesn't specify whether it's produced by the tip or the blade of the tongue.
Turkish grammars, like Turkish Grammar, 1976, by Robert Underhill or Turkish Grammar, 2nd edition, 2000, by Geoffrey Lewis, state that the Turkish /n/ is apical, produced with the tip of the tongue.
Also note that the Turkish letter
n preceding the letters
p is pronounced as [m] (e.g. İstanbul) and when
n precedes the letters
k it is pronounced as [ŋ] (e.g. Ankara).