diff --git a/src/adjusters/TaxJar.php b/src/adjusters/TaxJar.php
index 9052c32..4d0e4a7 100644
--- a/src/adjusters/TaxJar.php
+++ b/src/adjusters/TaxJar.php
@@ -78,6 +78,10 @@ public function adjust(Order $order): array
             return [];
         }
 
+        if (empty($order->getLineItems())) {
+            return [];
+        }
+
         try {
             $orderTaxes = $this->_getOrderTaxData();
         } catch (Exception $e) {