diff --git a/app/Services/Invoice/EInvoice/ZugferdEInvoice.php b/app/Services/Invoice/EInvoice/ZugferdEInvoice.php
index b340c85b24a2..e5a8e8953e48 100644
--- a/app/Services/Invoice/EInvoice/ZugferdEInvoice.php
+++ b/app/Services/Invoice/EInvoice/ZugferdEInvoice.php
@@ -98,7 +98,9 @@ class ZugferdEInvoice extends AbstractService
                 if (!empty($item->notes)){
                    $xrechnung->setDocumentPositionProductDetails($item->product_key, $item->notes);
                 }
-                $xrechnung->setDocumentPositionProductDetails($item->product_key);
+                else {
+                    $xrechnung->setDocumentPositionProductDetails($item->product_key);
+                }
             }
             else {
                 if (!empty($item->notes)){
@@ -161,7 +163,7 @@ class ZugferdEInvoice extends AbstractService
 
 
         if ($this->invoice->isPartial()) {
-            $xrechnung->setDocumentSummation($this->invoice->amount, $this->invoice->balance, $invoicing_data->getSubTotal(), $invoicing_data->getTotalSurcharges(), $invoicing_data->getTotalDiscount(), $invoicing_data->getSubTotal(), $invoicing_data->getItemTotalTaxes(), null, $this->invoice->partial);
+            $xrechnung->setDocumentSummation($this->invoice->amount, $this->invoice->balance, $invoicing_data->getSubTotal(), $invoicing_data->getTotalSurcharges(), $invoicing_data->getTotalDiscount(), $invoicing_data->getSubTotal(), $invoicing_data->getItemTotalTaxes(), null, (float) $this->invoice->partial);
         } else {
             $xrechnung->setDocumentSummation($this->invoice->amount, $this->invoice->balance, $invoicing_data->getSubTotal(), $invoicing_data->getTotalSurcharges(), $invoicing_data->getTotalDiscount(), $invoicing_data->getSubTotal(), $invoicing_data->getItemTotalTaxes(), null, 0.0);
         }
@@ -236,7 +238,8 @@ class ZugferdEInvoice extends AbstractService
         }
         return $tax_type;
     }
-    private function addtoTaxMap(string $tax_type, float $net_amount, float $tax_rate){
+    private function addtoTaxMap(string $tax_type, float $net_amount, float $tax_rate): void
+    {
         $hash = hash("md5", $tax_type."-".$tax_rate);
         if (array_key_exists($hash, $this->tax_map)){
             $this->tax_map[$hash]["net_amount"] += $net_amount;