diff --git a/modules/tax/src/TaxOrderProcessor.php b/modules/tax/src/TaxOrderProcessor.php
index 690ccc8..6a93453 100644
--- a/modules/tax/src/TaxOrderProcessor.php
+++ b/modules/tax/src/TaxOrderProcessor.php
@@ -208,7 +208,7 @@ class TaxOrderProcessor implements OrderProcessorInterface {
     if (empty($this->taxTypes)) {
       $tax_type_storage = $this->entityTypeManager->getStorage('commerce_tax_type');
       $this->taxTypes = $tax_type_storage->loadByProperties(['status' => TRUE]);
-      uasort($entities, [TaxType::class, 'sort']);
+      uasort($this->taxTypes, [TaxType::class, 'sort']);
     }
 
     return $this->taxTypes;
diff --git a/modules/tax/src/TaxTypeManager.php b/modules/tax/src/TaxTypeManager.php
index 251c358..71a5033 100644
--- a/modules/tax/src/TaxTypeManager.php
+++ b/modules/tax/src/TaxTypeManager.php
@@ -13,6 +13,17 @@ use Drupal\Core\Plugin\DefaultPluginManager;
 class TaxTypeManager extends DefaultPluginManager {
 
   /**
+   * Default values for each tax type plugin.
+   *
+   * @var array
+   */
+  protected $defaults = [
+    'id' => '',
+    'label' => '',
+    'weight' => 0,
+  ];
+
+  /**
    * Constructs a new TaxTypeManager object.
    *
    * @param \Traversable $namespaces