diff --git a/examples/createSelfEmployedReceipt.php b/examples/createSelfEmployedReceipt.php
index 20d834d..7f21c3f 100644
--- a/examples/createSelfEmployedReceipt.php
+++ b/examples/createSelfEmployedReceipt.php
@@ -12,35 +12,19 @@
     //die();
     
     $invoice = SelfEmployedReceiptModel::new(
-        tarih          : '20/10/2022',  // Opsiyonel @string (dd/mm/yyyy) @default=now
-        saat           : '14:25:34',    // Opsiyonel @string (hh/mm/ss)   @default=now
-        paraBirimi     : Currency::USD, // Opsiyonel @Currency            @default=Currency::TRY
-        dovizKuru      : 18.56,         // Opsiyonel @float               @default=0
-        vknTckn        : '32669381008', // Zorunlu   @string                
-        aliciAdi       : 'Mert',        // Zorunlu   @string
-        aliciSoyadi    : 'Levent',      // Zorunlu   @string
-        aliciUnvan     : '',            // Opsiyonel @string
-        adres          : '',            // Opsiyonel @string
-        binaAdi        : '',            // Opsiyonel @string
-        binaNo         : '',            // Opsiyonel @string
-        kapiNo         : '',            // Opsiyonel @string
-        kasabaKoy      : '',            // Opsiyonel @string
-        mahalleSemtIlce: '',            // Opsiyonel @string
-        sehir          : '',            // Opsiyonel @string
-        postaKodu      : '',            // Opsiyonel @string
-        ulke           : 'Türkiye',     // Zorunlu   @string
-        vergiDairesi   : '',            // Opsiyonel @string
-        aciklama       : '',            // Opsiyonel @string
-        kdvTahakkukIcin: false,         // Opsiyonel @boolean             @default=false
+        vknTckn    : '32669381008',
+        aliciAdi   : 'Mert',
+        aliciSoyadi: 'Levent',
+        ulke       : 'Türkiye',
     );
 
     $invoice->addItem(
         SelfEmployedReceiptItemModel::new(
-            neIcinAlindigi  : 'Dava Vekilliği', // Zorunlu   @string
-            brutUcret       : 100,              // Zorunlu   @float
-            kdvOrani        : 18,               // Zorunlu   @int
-            gvStopajOrani   : 20,               // Opsiyonel @int
-            kdvTevkifatOrani: 40,               // Opsiyonel @int
+            neIcinAlindigi  : 'Dava Vekilliği',
+            brutUcret       : 100,
+            kdvOrani        : 18,
+            gvStopajOrani   : 20,
+            kdvTevkifatOrani: 40,
         )
     );
 
diff --git a/src/Models/AbstractModel.php b/src/Models/AbstractModel.php
index 5141472..735937d 100644
--- a/src/Models/AbstractModel.php
+++ b/src/Models/AbstractModel.php
@@ -77,7 +77,7 @@ public function __constuct()
 
         if (!$this->isImported() && $items = $this->getItems()) {
             $this->clearItems()->addItem(...array_map(
-                fn ($item) => new InvoiceItemModel(...$item), $items
+                fn ($item) => new (substr(get_called_class(), 0, -5) . 'ItemModel')(...$item), $items
             ));
         }
     }
diff --git a/src/Models/ProducerReceiptItemModel.php b/src/Models/ProducerReceiptItemModel.php
index bd553be..3940aa2 100644
--- a/src/Models/ProducerReceiptItemModel.php
+++ b/src/Models/ProducerReceiptItemModel.php
@@ -66,7 +66,8 @@ public function addTax(Tax $tax, int $rate, float $amount = 0): self
      */
     public function prepare(ModelInterface $parent): self
     {
-        return $this->exportTaxes(true);
+        $this->calculateTaxes();
+        return $this;
     }
 
     /**
@@ -89,7 +90,7 @@ public function getTotals(): array
      */
     public function export(): array
     {
-        return $this->keyMapper(array_merge($this->toArray(), $this->getTotals(), [
+        return $this->keyMapper(array_merge($this->toArray(), $this->getTotals(), $this->exportTaxes(true), [
             'birim' => $this->birim->value,
         ]));
     }