diff --git a/Model/TaxScheme.php b/Model/TaxScheme.php
index e1ca7cf..b436a43 100644
--- a/Model/TaxScheme.php
+++ b/Model/TaxScheme.php
@@ -504,4 +504,12 @@ public function getSchemeExchangeRate(?int $storeId): float
             $storeId
         );
     }
+
+    /**
+     * @return string
+     */
+    public function __toString(): string
+    {
+        return $this->getSchemeId();
+    }
 }