  The KLOE experiment at the DA$\Phi$NE $\phi$-factory performed precise
studies of charged and neutral kaon physics, low energy QCD, as well as tests
of CP and CPT invariance. For the new run the KLOE has been upgraded by adding
new tagger systems for the $\gamma\gamma$ physics, the inner tracking chamber
and two calorimeters in the final focusing region. We are also improving on
kaon identification techniques, in particular algorithms for the $K_S$ meson
tagging. In this article we discuss the impact of the improved tagging
procedure on studies of the $K_S$ decays.
