Add debugging to rounding calculation to identify why 1.00 instead of 0.90

- Added error_log statements to track total difference and VAT TD amount
- Added logging for remaining difference calculation
- Will help identify why rounding entry shows 1.00 instead of 0.90
- Check error logs after generating PDF to see calculation values

core/class/declarationtva_pdf.class.php

@@ -2074,6 +2074,10 @@ class DeclarationTVA_PDF
         // Get VAT amount from line TD (this should be the main balancing amount)
         $vat_td_amount = $this->getVATAmountFromLineTD($declaration);
         
+        // Debug logging
+        error_log("DeclarationTVA: Total difference: " . $difference);
+        error_log("DeclarationTVA: VAT TD amount: " . $vat_td_amount);
+        
         if ($vat_td_amount > 0) {
             // Main balancing entry using VAT amount from line TD
             if ($difference < 0) {
@@ -2098,6 +2102,8 @@ class DeclarationTVA_PDF
             
             // Rounding entry for the remaining difference (use real value, not rounded)
             $remaining_diff = abs($difference) - $vat_td_amount;
+            error_log("DeclarationTVA: Remaining difference: " . $remaining_diff);
+            
             if ($remaining_diff >= 0.01) {
                 if ($difference < 0) {
                     $balancing_entries[] = array(