diff --git a/src/TaxTotal.php b/src/TaxTotal.php
index 4f6d1ab..3abf236 100644
--- a/src/TaxTotal.php
+++ b/src/TaxTotal.php
@@ -4,8 +4,9 @@
 
 use InvalidArgumentException;
 
-use function Sabre\Xml\Deserializer\keyValue;
+use function Sabre\Xml\Deserializer\mixedContent;
 
+use Doctrine\Common\Collections\ArrayCollection;
 use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
 use Sabre\Xml\XmlDeserializable;
@@ -101,23 +102,19 @@ public function xmlSerialize(Writer $writer): void
 
     /**
      * The xmlDeserialize method is called during xml reading.
-     * @param Reader $xml
+     * @param Reader $reader
      * @return static
      */
     public static function xmlDeserialize(Reader $reader)
     {
-        $keyValues = keyValue($reader);
+        $mixedContent = mixedContent($reader);
+        $collection = new ArrayCollection($mixedContent);
 
-        $taxSubTotals = array_values(
-            array_filter(
-                $keyValues,
-                fn ($value, $key) => $key === Schema::CAC . 'TaxSubtotal', ARRAY_FILTER_USE_BOTH
-            )
-        );
+        $taxAmount = ReaderHelper::getTag(Schema::CBC . 'TaxAmount', $collection);
+        $taxSubTotals = ReaderHelper::getArrayValue(Schema::CAC . 'TaxSubtotal', $collection);
 
         return (new static())
-            ->setTaxAmount(isset($keyValues[Schema::CBC.'TaxAmount']) ? floatval($keyValues[Schema::CBC.'TaxAmount']) : null)
+            ->setTaxAmount(isset($taxAmount) ? floatval($taxAmount['value']) : null)
             ->setTaxSubTotals($taxSubTotals);
-        ;
     }
 }
diff --git a/tests/Read/TaxTotalTest.php b/tests/Read/TaxTotalTest.php
index 34d0807..1e1fb79 100644
--- a/tests/Read/TaxTotalTest.php
+++ b/tests/Read/TaxTotalTest.php
@@ -111,11 +111,13 @@ public function testSingleTaxTotalDeserializes()
 
         $this->assertInstanceOf(TaxTotal::class, $taxTotal);
 
+        $this->assertEquals(20.79, $taxTotal->getTaxAmount());
+
         $taxSubtotals = $taxTotal->getTaxSubTotals();
 
         $this->assertCount(1, $taxSubtotals);
 
-        $firstSubtotal = $taxSubtotals[0];
+        $firstSubtotal = reset($taxSubtotals);
 
         $this->assertInstanceOf(TaxSubTotal::class, $firstSubtotal);