+  if ($form->{reporttype} eq "custom") {
+
+    #forgotten the year --> thisyear
+    if ($form->{year} !~ m/^\d\d\d\d$/) {
+      $locale->date(\%myconfig, $form->current_date(\%myconfig), 0) =~
+        /(\d\d\d\d)/;
+      $form->{year} = $1;
+    }
+
+    #yearly report
+    if ($form->{duetyp} eq "13") {
+      $form->{fromdate} = "1.1.$form->{year}";
+      $form->{todate}   = "31.12.$form->{year}";
+    }
+
+    #Quater reports
+    if ($form->{duetyp} eq "A") {
+      $form->{fromdate} = "1.1.$form->{year}";
+      $form->{todate}   = "31.3.$form->{year}";
+    }
+    if ($form->{duetyp} eq "B") {
+      $form->{fromdate} = "1.4.$form->{year}";
+      $form->{todate}   = "30.6.$form->{year}";
+    }
+    if ($form->{duetyp} eq "C") {
+      $form->{fromdate} = "1.7.$form->{year}";
+      $form->{todate}   = "30.9.$form->{year}";
+    }
+    if ($form->{duetyp} eq "D") {
+      $form->{fromdate} = "1.10.$form->{year}";
+      $form->{todate}   = "31.12.$form->{year}";
+    }
+
+    #Monthly reports
+  SWITCH: {
+      $form->{duetyp} eq "1" && do {
+        $form->{fromdate} = "1.1.$form->{year}";
+        $form->{todate}   = "31.1.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "2" && do {
+        $form->{fromdate} = "1.2.$form->{year}";
+
+        #this works from 1901 to 2099, 1900 and 2100 fail.
+        my $leap = ($form->{year} % 4 == 0) ? "29" : "28";
+        $form->{todate} = "$leap.2.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "3" && do {
+        $form->{fromdate} = "1.3.$form->{year}";
+        $form->{todate}   = "31.3.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "4" && do {
+        $form->{fromdate} = "1.4.$form->{year}";
+        $form->{todate}   = "30.4.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "5" && do {
+        $form->{fromdate} = "1.5.$form->{year}";
+        $form->{todate}   = "31.5.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "6" && do {
+        $form->{fromdate} = "1.6.$form->{year}";
+        $form->{todate}   = "30.6.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "7" && do {
+        $form->{fromdate} = "1.7.$form->{year}";
+        $form->{todate}   = "31.7.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "8" && do {
+        $form->{fromdate} = "1.8.$form->{year}";
+        $form->{todate}   = "31.8.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "9" && do {
+        $form->{fromdate} = "1.9.$form->{year}";
+        $form->{todate}   = "30.9.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "10" && do {
+        $form->{fromdate} = "1.10.$form->{year}";
+        $form->{todate}   = "31.10.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "11" && do {
+        $form->{fromdate} = "1.11.$form->{year}";
+        $form->{todate}   = "30.11.$form->{year}";
+        last SWITCH;
+      };
+      $form->{duetyp} eq "12" && do {
+        $form->{fromdate} = "1.12.$form->{year}";
+        $form->{todate}   = "31.12.$form->{year}";
+        last SWITCH;
+      };
+    }
+  }
+