Add debugging for D-section calculation

Added:
- Debug logging for total VAT collected and deductible amounts
- This will help identify why line 25 shows wrong value (should be 406.28)
- Will show what values are being summed for the totals

core/class/declarationtva.class.php

@@ -276,6 +276,9 @@ class DeclarationTVA
             }
         }
 
+        // Debug totals
+        error_log("DeclarationTVA: Total VAT collected: $total_vat_collected, Total VAT deductible: $total_vat_deductible");
+        
         // Calculate D-section result lines (25, 26, 28, 29)
         $this->calculateDSectionLines($declaration_id, $total_vat_collected, $total_vat_deductible);