diff --git a/cg/cg4300.cpp b/cg/cg4300.cpp
index f1fd3ad13..528f40616 100755
--- a/cg/cg4300.cpp
+++ b/cg/cg4300.cpp
@@ -596,6 +596,26 @@ bool TLiquidazione_app::what_freq_handler(TMask_field& f, KEY key)
   return TRUE;
 }
 
+bool TLiquidazione_app::lst_tm_handler(TMask_field& f, KEY key)
+{
+  if (key == K_SPACE)
+  {
+    TString s(f.get());
+    if (s == "13")
+    {
+      f.mask().field(CG43_LST_CALC_13A).show();
+      f.mask().field(CG43_LST_CALC).hide();
+      f.mask().field(CG43_LST_CALC).set("3");
+    }
+    else
+    {
+      f.mask().field(CG43_LST_CALC_13A).hide();
+      f.mask().field(CG43_LST_CALC).show();
+    }
+  }
+  return TRUE;
+}
+
 void TLiquidazione_app::reset_choices(TMask& m)
 {
   _selected.reset();  
@@ -659,6 +679,8 @@ bool TLiquidazione_app::set_liquidazione()
   m.set_handler(CG43_FLD_DFR,  fr_ditt_handler);
   m.set_handler(CG43_RDB_VERS, what_freq_handler);
   m.set_handler(CG43_FLD_ANNO, ch_year_handler);
+  m.set_handler(CG43_LST_MESE, lst_tm_handler);
+  m.set_handler(CG43_LST_TRIM, lst_tm_handler);
   
   
   m.field(CG43_FLD_SELECTED).set(format("%ld",_selected.ones()));
diff --git a/cg/cg4300.h b/cg/cg4300.h
index 2d7af2946..45a7a7444 100755
--- a/cg/cg4300.h
+++ b/cg/cg4300.h
@@ -334,6 +334,7 @@ protected:
   static bool to_ditt_handler(TMask_field& f, KEY key);
   static bool fr_ditt_handler(TMask_field& f, KEY key);
   static bool what_freq_handler(TMask_field& f, KEY key);
+  static bool lst_tm_handler(TMask_field& f, KEY key);
   
   static TLiquidazione_app& app() { return (TLiquidazione_app&)main_app(); }
   
diff --git a/cg/cg4300a.h b/cg/cg4300a.h
index 62f5b3133..0a9f9014e 100755
--- a/cg/cg4300a.h
+++ b/cg/cg4300a.h
@@ -13,4 +13,5 @@
 #define CG43_FLD_DTO          114
 #define CG43_LST_CALC         115
 #define CG43_CHK_FINAL        116
+#define CG43_LST_CALC_13A     117
 
diff --git a/cg/cg4300a.uml b/cg/cg4300a.uml
index 39d71eec2..11da10696 100755
--- a/cg/cg4300a.uml
+++ b/cg/cg4300a.uml
@@ -84,6 +84,14 @@ BEGIN
   ITEM "3|Da inizio anno"
 END
 
+LIST CG43_LST_CALC_13A 15
+BEGIN
+  PROMPT 4 8 "Ricalcola "
+  HELP "Indicare se rifare il calcolo durante la stampa"
+  ITEM "3|Da inizio anno"
+  FLAGS "H"
+END
+
 GROUPBOX DLG_NULL 60 3
 BEGIN   
   PROMPT 4 10 "Stampa"