diff --git a/core/class/declarationtva_config.class.php b/core/class/declarationtva_config.class.php
index 583ae01..a8426c8 100644
--- a/core/class/declarationtva_config.class.php
+++ b/core/class/declarationtva_config.class.php
@@ -102,11 +102,15 @@ class DeclarationTVA_Config
      */
     public function updateAccountMapping($ca3_line, $account_codes)
     {
+        // Debug: Log what we're trying to save
+        error_log("DeclarationTVA: updateAccountMapping called for line $ca3_line with codes: " . print_r($account_codes, true));
+        
         // First, deactivate all existing mappings for this CA-3 line
         $sql = "UPDATE " . MAIN_DB_PREFIX . "declarationtva_account_mappings 
                 SET is_active = 0 
                 WHERE entity = " . $this->entity . " AND ca3_line = '" . $this->db->escape($ca3_line) . "'";
-        $this->db->query($sql);
+        $result1 = $this->db->query($sql);
+        error_log("DeclarationTVA: Deactivate query result: " . ($result1 ? 'SUCCESS' : 'FAILED - ' . $this->db->lasterror()));
         
         // Then insert/activate new mappings
         if (!empty($account_codes)) {
@@ -118,6 +122,7 @@ class DeclarationTVA_Config
                                  AND ca3_line = '" . $this->db->escape($ca3_line) . "' 
                                  AND account_code = '" . $this->db->escape($account_code) . "'";
                     $check_result = $this->db->query($check_sql);
+                    error_log("DeclarationTVA: Check query result: " . ($check_result ? 'SUCCESS' : 'FAILED - ' . $this->db->lasterror()));
                     
                     if ($check_result && $this->db->num_rows($check_result) > 0) {
                         // Update existing mapping
@@ -126,14 +131,16 @@ class DeclarationTVA_Config
                                 WHERE entity = " . $this->entity . " 
                                 AND ca3_line = '" . $this->db->escape($ca3_line) . "' 
                                 AND account_code = '" . $this->db->escape($account_code) . "'";
-                        $this->db->query($sql);
+                        $result2 = $this->db->query($sql);
+                        error_log("DeclarationTVA: Update query result: " . ($result2 ? 'SUCCESS' : 'FAILED - ' . $this->db->lasterror()));
                     } else {
                         // Insert new mapping
                         $sql = "INSERT INTO " . MAIN_DB_PREFIX . "declarationtva_account_mappings 
                                 (entity, ca3_line, account_code, account_label, vat_rate, is_active, created_date) 
                                 VALUES (" . $this->entity . ", '" . $this->db->escape($ca3_line) . "', 
                                 '" . $this->db->escape($account_code) . "', '', 0, 1, NOW())";
-                        $this->db->query($sql);
+                        $result3 = $this->db->query($sql);
+                        error_log("DeclarationTVA: Insert query result: " . ($result3 ? 'SUCCESS' : 'FAILED - ' . $this->db->lasterror()));
                     }
                 }
             }
@@ -195,6 +202,9 @@ class DeclarationTVA_Config
             }
         }
 
+        // Debug: Log what we're retrieving
+        error_log("DeclarationTVA: getAccountMappingsByLine retrieved: " . print_r($mappings, true));
+        
         return $mappings;
     }