diff --git a/Analysis/DataModel/include/AnalysisDataModel/HFSecondaryVertex.h b/Analysis/DataModel/include/AnalysisDataModel/HFSecondaryVertex.h
index 9dc72eaea38f6..9ccce72eb0835 100644
--- a/Analysis/DataModel/include/AnalysisDataModel/HFSecondaryVertex.h
+++ b/Analysis/DataModel/include/AnalysisDataModel/HFSecondaryVertex.h
@@ -27,6 +27,14 @@ using namespace o2::analysis;
 
 namespace o2::aod
 {
+namespace hf_selcollision
+{
+DECLARE_SOA_COLUMN(WhyRejectColl, whyRejectColl, int); //!
+} // namespace hf_selcollision
+
+DECLARE_SOA_TABLE(HFSelCollision, "AOD", "HFSELCOLLISION", //!
+                  hf_selcollision::WhyRejectColl);
+
 namespace hf_seltrack
 {
 DECLARE_SOA_COLUMN(IsSelProng, isSelProng, int); //!
@@ -49,12 +57,12 @@ using BigTracksPID = soa::Join<BigTracks,
 
 namespace hf_track_index
 {
-DECLARE_SOA_INDEX_COLUMN_FULL(Index0, index0, int, Tracks, "_0"); //!
-DECLARE_SOA_INDEX_COLUMN_FULL(Index1, index1, int, Tracks, "_1"); //!
-DECLARE_SOA_INDEX_COLUMN_FULL(Index2, index2, int, Tracks, "_2"); //!
-DECLARE_SOA_INDEX_COLUMN_FULL(Index3, index3, int, Tracks, "_3"); //!
+DECLARE_SOA_INDEX_COLUMN_FULL(Index0, index0, int, Tracks, "_0");          //!
+DECLARE_SOA_INDEX_COLUMN_FULL(Index1, index1, int, Tracks, "_1");          //!
+DECLARE_SOA_INDEX_COLUMN_FULL(Index2, index2, int, Tracks, "_2");          //!
+DECLARE_SOA_INDEX_COLUMN_FULL(Index3, index3, int, Tracks, "_3");          //!
 DECLARE_SOA_INDEX_COLUMN_FULL(IndexV0, indexV0, int, aod::V0Datas, "_V0"); //!
-DECLARE_SOA_COLUMN(HFflag, hfflag, uint8_t);                      //!
+DECLARE_SOA_COLUMN(HFflag, hfflag, uint8_t);                               //!
 
 DECLARE_SOA_COLUMN(D0ToKPiFlag, d0ToKPiFlag, uint8_t);   //!
 DECLARE_SOA_COLUMN(JpsiToEEFlag, jpsiToEEFlag, uint8_t); //!
@@ -445,9 +453,9 @@ DECLARE_SOA_TABLE(HfCandCascBase, "AOD", "HFCANDCASCBASE", //!
                   v0data::MAntiLambda<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>,
                   v0data::MK0Short<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>);
 /*,
-		  v0data::MLambda<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>,
-		  v0data::MAntiLambda<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>,
-		  v0data::MK0Short<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>);
+  v0data::MLambda<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>,
+  v0data::MAntiLambda<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>,
+  v0data::MK0Short<v0data::PxPos, v0data::PyPos, v0data::PzPos, v0data::PxNeg, v0data::PyNeg, v0data::PzNeg>);
 */
 // extended table with expression columns that can be used as arguments of dynamic columns
 DECLARE_SOA_EXTENDED_TABLE_USER(HfCandCascExt, HfCandCascBase, "HFCANDCASCEXT", //!
diff --git a/Analysis/Tasks/PWGHF/HFTrackIndexSkimsCreator.cxx b/Analysis/Tasks/PWGHF/HFTrackIndexSkimsCreator.cxx
index a2684c9e08cf3..51d016bf5ee3a 100644
--- a/Analysis/Tasks/PWGHF/HFTrackIndexSkimsCreator.cxx
+++ b/Analysis/Tasks/PWGHF/HFTrackIndexSkimsCreator.cxx
@@ -18,6 +18,7 @@
 #include "Framework/AnalysisTask.h"
 #include "Framework/HistogramRegistry.h"
 #include "DetectorsVertexing/DCAFitterN.h"
+#include "AnalysisDataModel/EventSelection.h"
 #include "AnalysisDataModel/HFSecondaryVertex.h"
 #include "AnalysisCore/trackUtilities.h"
 #include "AnalysisCore/HFConfigurables.h"
@@ -58,8 +59,57 @@ using MyTracks = soa::Join<aod::FullTracks, aod::HFSelTrack, aod::TracksExtended
 #define MY_DEBUG_MSG(condition, cmd)
 #endif
 
+/// Event selection
+struct HfTagSelCollisions {
+
+  Produces<aod::HFSelCollision> rowSelectedCollision;
+
+  Configurable<bool> doValPlots{"doValPlots", true, "fill histograms"};
+  Configurable<std::string> triggerClassName{"triggerClassName", "kINT7", "trigger class"};
+  int triggerClass = std::distance(aliasLabels, std::find(aliasLabels, aliasLabels + kNaliases, triggerClassName.value.data()));
+
+  HistogramRegistry registry{
+    "registry",
+    {{"hEvents", "Events;;entries", {HistType::kTH1F, {{3, 0.5, 3.5}}}}}};
+
+  void init(InitContext const&)
+  {
+    std::string labels[3] = {"processed collisions", "selected collisions", "rej. trigger class"};
+    for (int iBin = 0; iBin < 3; iBin++) {
+      registry.get<TH1>(HIST("hEvents"))->GetXaxis()->SetBinLabel(iBin + 1, labels[iBin].data());
+    }
+  }
+
+  // event selection
+  void process(soa::Join<aod::Collisions, aod::EvSels>::iterator const& collision)
+  {
+    int statusCollision = 0;
+
+    if (doValPlots) {
+      registry.get<TH1>(HIST("hEvents"))->Fill(1);
+    }
+
+    if (!collision.alias()[triggerClass]) {
+      statusCollision |= BIT(0);
+      if (doValPlots) {
+        registry.get<TH1>(HIST("hEvents"))->Fill(3);
+      }
+    }
+
+    //TODO: add more event selection criteria
+
+    // selected events
+    if (doValPlots && statusCollision == 0) {
+      registry.get<TH1>(HIST("hEvents"))->Fill(2);
+    }
+
+    // fill table row
+    rowSelectedCollision(statusCollision);
+  };
+};
+
 /// Track selection
-struct SelectTracks {
+struct HfTagSelTrack {
 
   // enum for candidate type
   enum CandidateType {
@@ -264,7 +314,7 @@ struct SelectTracks {
 //____________________________________________________________________________________________________________________________________________
 
 /// Pre-selection of 2-prong and 3-prong secondary vertices
-struct HFTrackIndexSkimsCreator {
+struct HfTrackIndexSkimsCreator {
   Produces<aod::HfTrackIndexProng2> rowTrackIndexProng2;
   Produces<aod::HfCutStatusProng2> rowProng2CutStatus;
   Produces<aod::HfTrackIndexProng3> rowTrackIndexProng3;
@@ -273,8 +323,6 @@ struct HFTrackIndexSkimsCreator {
   //Configurable<int> nCollsMax{"nCollsMax", -1, "Max collisions per file"}; //can be added to run over limited collisions per file - for tesing purposes
   Configurable<bool> dovalplots{"dovalplots", true, "fill histograms"};
   Configurable<int> do3prong{"do3prong", 0, "do 3 prong"};
-  // event selection
-  Configurable<int> triggerindex{"triggerindex", -1, "trigger index"};
   // vertexing parameters
   Configurable<double> bz{"bz", 5., "magnetic field kG"};
   Configurable<bool> propdca{"propdca", true, "create tracks version propagated to PCA"};
@@ -309,6 +357,9 @@ struct HFTrackIndexSkimsCreator {
      {"hmassXicToPKPi", "#Xi_{c} candidates;inv. mass (p K #pi) (GeV/#it{c}^{2});entries", {HistType::kTH1F, {{500, 0., 5.}}}}}};
 
   Filter filterSelectTracks = (aod::hf_seltrack::isSelProng > 0 && aod::hf_seltrack::isSelProng < 4);
+  Filter filterSelectCollisions = (aod::hf_selcollision::whyRejectColl == 0);
+
+  using SelectedCollisions = soa::Filtered<soa::Join<aod::Collisions, aod::HFSelCollision>>;
   using SelectedTracks = soa::Filtered<soa::Join<aod::Tracks, aod::TracksCov, aod::TracksExtra, aod::HFSelTrack>>;
 
   // FIXME
@@ -323,7 +374,7 @@ struct HFTrackIndexSkimsCreator {
   // int nColls{0}; //can be added to run over limited collisions per file - for tesing purposes
 
   void process( //soa::Join<aod::Collisions, aod::Cents>::iterator const& collision, //FIXME add centrality when option for variations to the process function appears
-    aod::Collision const& collision,
+    SelectedCollisions::iterator const& collision,
     aod::BCs const& bcs,
     SelectedTracks const& tracks)
   {
@@ -341,15 +392,6 @@ struct HFTrackIndexSkimsCreator {
 
     //auto centrality = collision.centV0M(); //FIXME add centrality when option for variations to the process function appears
 
-    int trigindex = int{triggerindex};
-    if (trigindex != -1) {
-      uint64_t triggerMask = collision.bc().triggerMask();
-      bool isTriggerClassFired = triggerMask & 1ul << (trigindex - 1);
-      if (!isTriggerClassFired) {
-        return;
-      }
-    }
-
     //FIXME move above process function
     const int n2ProngDecays = hf_cand_prong2::DecayType::N2ProngDecays; // number of 2-prong hadron types
     const int n3ProngDecays = hf_cand_prong3::DecayType::N3ProngDecays; // number of 3-prong hadron types
@@ -1003,7 +1045,7 @@ struct HFTrackIndexSkimsCreator {
 /// to run: o2-analysis-weak-decay-indices --aod-file AO2D.root -b | o2-analysis-lambdakzerobuilder -b |
 ///         o2-analysis-trackextension -b | o2-analysis-hf-track-index-skims-creator -b
 
-struct HFTrackIndexSkimsCreatorCascades {
+struct HfTrackIndexSkimsCreatorCascades {
   Produces<aod::HfTrackIndexCasc> rowTrackIndexCasc;
   //  Produces<aod::HfTrackIndexProng2> rowTrackIndexCasc;
 
@@ -1072,9 +1114,12 @@ struct HFTrackIndexSkimsCreatorCascades {
   double massLc = RecoDecay::getMassPDG(pdg::Code::kLambdaCPlus);
   double mass2K0sP{0.}; // WHY HERE?
 
+  Filter filterSelectCollisions = (aod::hf_selcollision::whyRejectColl == 0);
+
   using FullTracksExt = soa::Join<aod::FullTracks, aod::TracksExtended>;
+  using SelectedCollisions = soa::Filtered<soa::Join<aod::Collisions, aod::HFSelCollision>>;
 
-  void process(aod::Collision const& collision,
+  void process(SelectedCollisions::iterator const& collision,
                aod::BCs const& bcs,
                //soa::Filtered<aod::V0Datas> const& V0s,
                aod::V0Datas const& V0s,
@@ -1265,12 +1310,13 @@ struct HFTrackIndexSkimsCreatorCascades {
 WorkflowSpec defineDataProcessing(ConfigContext const& cfgc)
 {
   WorkflowSpec workflow{
-    adaptAnalysisTask<SelectTracks>(cfgc, TaskName{"hf-produce-sel-track"}),
-    adaptAnalysisTask<HFTrackIndexSkimsCreator>(cfgc, TaskName{"hf-track-index-skims-creator"})};
+    adaptAnalysisTask<HfTagSelCollisions>(cfgc),
+    adaptAnalysisTask<HfTagSelTrack>(cfgc),
+    adaptAnalysisTask<HfTrackIndexSkimsCreator>(cfgc)};
 
   const bool doLcK0Sp = cfgc.options().get<bool>("do-LcK0Sp");
   if (doLcK0Sp) {
-    workflow.push_back(adaptAnalysisTask<HFTrackIndexSkimsCreatorCascades>(cfgc, TaskName{"hf-track-index-skims-cascades-creator"}));
+    workflow.push_back(adaptAnalysisTask<HfTrackIndexSkimsCreatorCascades>(cfgc));
   }
 
   return workflow;