diff --git a/hesabixCore/src/Controller/Plugins/TaxSettingsController.php b/hesabixCore/src/Controller/Plugins/TaxSettingsController.php
index ff2e2d1..1454a01 100644
--- a/hesabixCore/src/Controller/Plugins/TaxSettingsController.php
+++ b/hesabixCore/src/Controller/Plugins/TaxSettingsController.php
@@ -1187,14 +1187,14 @@ class TaxSettingsController extends AbstractController
                     $buyerEconomicCode = null;
                 }
 
-                if (empty($buyerPostalCode) || trim($buyerPostalCode) === '' || count_chars($buyerPostalCode) != 10) {
+                if (empty($buyerPostalCode) || trim($buyerPostalCode) === '') {
                     $buyerPostalCode = null;
                 }
             }
 
             $personType = 1;
             
-            if (count_chars($buyerNationalId ) == 11) {
+            if (strlen($buyerNationalId) == 11) {
                 $personType = 2;
             }