  The importance of choosing suitable tetrads for the study of exact solutions
in f(T) gravity is discussed. For any given metric, we define the concept of
good tetrads as the tetrads satisfying the field equations without constrainig
the function f(T). Employing local Lorentz transformations, good tetrads in the
context of spherical symmetry are found for Schwarzschild-de Sitter solutions.
