What is the shape of the ${\mathrm{TeF}}_5^{-}$- anion?

The valence electrons in tellurium are initially 6. This atom will have a formal charge of -1 since it retains 1 non-bonding pair while sharing 5 valence electrons. This is the negative charge that exists on the compound anion.
A core atom with five covalently connected terminal atoms and one non-bonding pair makes up the whole structure. The geometries are, according to VSEPR theory,
The geometry of the electron domain is octahedral. The square pyramidal is equivalent to molecular geometry.