diff --git a/README.md b/README.md
index 8046eb4..2f717e9 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ The left sidebar groups reports by topic:
 - **Amazon** → *VAT Summary* (USt-Übersicht je Land)
 - **ODOO** → *Rechnungen pro Monat* (Pivot über Odoo-Rechnungen)
 - **Gesamt** → *Alle Rechnungen pro Monat* (PivotTable.js-Experiment)
-- **Schweiz** → *Quartal Schweiz* (AMAZON + ODOO, Lieferung in die Schweiz)
+- **Gesamt** → *Quartal Schweiz* (AMAZON + ODOO, Lieferung in die Schweiz)
 
 All groups start collapsed, so no submenu is visible when the page opens.
 Clicking a topic expands its submenu; clicking a submenu item switches the
diff --git a/index.html b/index.html
index b9a57c4..03ec31b 100644
--- a/index.html
+++ b/index.html
@@ -94,26 +94,6 @@
             <a class="submenu-item" href="#" data-view="gesamt-rechnungen-pivot">
               Alle Rechnungen pro Monat
             </a>
-          </div>
-        </div>
-
-        <!-- Schweiz -->
-        <div class="menu-group" data-group>
-          <button class="menu-main" type="button" data-toggle aria-expanded="false">
-            <span class="menu-logo">
-              <svg viewBox="0 0 48 48" aria-hidden="true">
-                <rect width="48" height="48" rx="12" fill="#d52b1e" />
-                <text x="24" y="30" text-anchor="middle" font-size="15" font-weight="700"
-                      fill="#ffffff" font-family="Arial, sans-serif">CH</text>
-              </svg>
-            </span>
-            <span class="menu-name">Schweiz</span>
-            <svg class="chevron" viewBox="0 0 24 24" aria-hidden="true">
-              <path d="M9 6l6 6-6 6" fill="none" stroke="currentColor" stroke-width="2.2"
-                    stroke-linecap="round" stroke-linejoin="round" />
-            </svg>
-          </button>
-          <div class="submenu">
             <a class="submenu-item" href="#" data-view="schweiz-quartal">
               Quartal Schweiz
             </a>
diff --git a/sql/Quartal_Schweiz.sql b/sql/Quartal_Schweiz.sql
index ac1d783..355737b 100644
--- a/sql/Quartal_Schweiz.sql
+++ b/sql/Quartal_Schweiz.sql
@@ -22,6 +22,13 @@
 -- In psql stattdessen:
 --     \set quarter '2026-Q3'
 --
+-- Diagnose (falls keine AMAZON-Zeilen geliefert werden):
+--     SELECT activity_period, count(*)
+--       FROM brandize_datacenter_amazon_vat_transaction
+--      WHERE arrival_country = 'CH' OR sale_arrival_country = 'CH'
+--      GROUP BY 1 ORDER BY 1;
+--     -- zeigt das tatsaechliche Format von activity_period
+--
 -- ---------------------------------------------------------------------------
 --  Spalten-Mapping  ODOO  ->  AMAZON
 --  (Felder ohne Amazon-Pendant bleiben leer)
@@ -67,18 +74,20 @@ quarters AS (
         make_date(yr::int, (qn - 1) * 3 + 1, 1) + INTERVAL '3 months' AS next_day
     FROM params
 ),
--- Die drei activity_period-Werte (Format 'YYYY-MMM', deutsche Kuerzel) fuer die
--- Amazon-Tabelle.
 qmonths AS (
-    SELECT
-        q.yr || '-' || CASE ((q.qn - 1) * 3 + m.m)
-            WHEN 1 THEN 'JAN' WHEN 2 THEN 'FEB' WHEN 3 THEN 'MÄR'
-            WHEN 4 THEN 'APR' WHEN 5 THEN 'MAI' WHEN 6 THEN 'JUN'
-            WHEN 7 THEN 'JUL' WHEN 8 THEN 'AUG' WHEN 9 THEN 'SEP'
-            WHEN 10 THEN 'OKT' WHEN 11 THEN 'NOV' WHEN 12 THEN 'DEZ'
-        END AS activity_period
+    -- Alle moeglichen Schreibweisen der 3 Quartalsmonate als 'YYYY-MMM'
+    -- (deutsche UND englische Kuerzel, da die gespeicherte Schreibweise je
+    --  nach Herkunft abweichen kann).
+    SELECT DISTINCT
+        q.yr || '-' || v.abbr AS activity_period
     FROM quarters q
-    CROSS JOIN generate_series(1, 3) AS m(m)
+    CROSS JOIN generate_series(1, 3) AS g(n)
+    JOIN (VALUES
+        (1, 'JAN'), (2, 'FEB'), (3, 'MÄR'), (3, 'MAR'), (4, 'APR'),
+        (5, 'MAI'), (5, 'MAY'), (6, 'JUN'), (7, 'JUL'), (8, 'AUG'),
+        (9, 'SEP'), (10, 'OKT'), (10, 'OCT'), (11, 'NOV'),
+        (12, 'DEZ'), (12, 'DEC')
+    ) AS v(mnum, abbr) ON v.mnum = (q.qn - 1) * 3 + g.n
 ),
 
 -- ===========================================================================
@@ -345,8 +354,10 @@ amazon_base AS (
             ELSE 0
         END AS rate
     FROM brandize_datacenter_amazon_vat_transaction a
-    WHERE a.activity_period IN (SELECT activity_period FROM qmonths)
-      AND a.arrival_country = 'CH'
+    WHERE upper(a.activity_period) IN (SELECT upper(activity_period) FROM qmonths)
+      -- Lieferung in die Schweiz: Ziel-/Versandland kann in arrival_country
+      -- oder sale_arrival_country stehen.
+      AND (upper(a.arrival_country) = 'CH' OR upper(a.sale_arrival_country) = 'CH')
       -- Optional: Gebuehrenzeilen ausschliessen (wie in VAT_Summary.sql):
       -- AND a.sales_channel <> 'AMAZON_FEE'
 ),