diff --git a/core/class/declarationtva.class.php b/core/class/declarationtva.class.php
index 86277ad..f0b052f 100644
--- a/core/class/declarationtva.class.php
+++ b/core/class/declarationtva.class.php
@@ -536,12 +536,17 @@ class DeclarationTVA
      */
     public function recalculateCA3Amounts($declaration_id)
     {
-        // Get declaration info
-        $declaration = $this->getDeclarationInfo($declaration_id);
-        if (!$declaration) {
+        // Get declaration info directly from database
+        $sql = "SELECT start_date, end_date FROM " . MAIN_DB_PREFIX . "declarationtva_declarations 
+                WHERE rowid = " . $declaration_id . " AND entity = " . $this->entity;
+        
+        $result = $this->db->query($sql);
+        if (!$result || $this->db->num_rows($result) == 0) {
             return false;
         }
         
+        $obj = $this->db->fetch_object($result);
+        
         // Clear existing CA-3 lines
         $sql = "DELETE FROM " . MAIN_DB_PREFIX . "declarationtva_ca3_lines 
                 WHERE declaration_id = " . $declaration_id;
@@ -549,8 +554,8 @@ class DeclarationTVA
         
         // Recalculate using declaration dates
         $period = array(
-            'start_date' => $declaration['start_date'],
-            'end_date' => $declaration['end_date']
+            'start_date' => $obj->start_date,
+            'end_date' => $obj->end_date
         );
         
         return $this->calculateCA3Amounts($declaration_id, $period);