  The most commonly used parameterizations of the Yukawa couplings in the two
Higgs doublet model are revisited. Their similitudes and differences are
emphasized and relations between the different notations used in the literature
are derived. Using these relations, bounds on the space of parameters of the
charged Higgs sector of the two Higgs doublet model are obtained. These
constraints are obtained from flavor observables like the measurement of B ->
Xs \gamma and the recent measurement of Bs -> \mu+ \mu- from LHCb. The ratio
R_{H+}=B(H+ -> \tau^+ \nu_\tau)/B(H+ -> t b) is evaluated for the two Higgs
doublet model type-III and type-II, and their differences are quantified.
