diff --git a/lib/quickbooks/service/base_service_json.rb b/lib/quickbooks/service/base_service_json.rb
index ab1ee641..f39a0556 100644
--- a/lib/quickbooks/service/base_service_json.rb
+++ b/lib/quickbooks/service/base_service_json.rb
@@ -8,23 +8,32 @@ class BaseServiceJSON < BaseService
 
       private
 
+      # Intuit typical response:
+      # {"Fault":{"Error":[{"Message":"Duplicate Name Exists Error","Detail":"The name supplied already exists. : null","code":"6240"}],"type":"ValidationFault"},"time":"2024-06-23T04:29:11.688-07:00"}
+      #
+      # Intuit intermittently returns an alternate response:
+      # {"fault":{"error":[{"message":"Duplicate Name Exists Error","detail":"The name supplied already exists. : null","code":"6240"}],"type":"ValidationFault"},"batchItemResponse":[],"attachableResponse":[],"time":1719142418269,"cdcresponse":[]}
+      def dereference_response(hsh, key)
+        hsh[key] || hsh[key.downcase]
+      end
+
       def parse_json(json)
         @last_response_json = json
       end
 
       def response_is_error?
-        @last_response_json['Fault'].present?
+        dereference_response(@last_response_json, 'Fault').present?
       end
 
       def parse_intuit_error
         error = {:message => "", :detail => "", :type => nil, :code => 0}
         resp = JSON.parse(@last_response_json)
-        fault = resp['Fault']
+        fault = dereference_response(resp, 'Fault')
         if fault.present?
           error[:type] = fault['type'] if fault.has_key?('type')
-          if fault_error = fault['Error'].first
-            error[:message] = fault_error['Message']
-            error[:detail] = fault_error['Detail']
+          if fault_error = dereference_response(fault, 'Error').first
+            error[:message] = dereference_response(fault_error, 'Message')
+            error[:detail] = dereference_response(fault_error, 'Detail')
             error[:code] = fault_error['code']
           end
         end
diff --git a/lib/quickbooks/service/change_service.rb b/lib/quickbooks/service/change_service.rb
index af704ea9..ebeec657 100644
--- a/lib/quickbooks/service/change_service.rb
+++ b/lib/quickbooks/service/change_service.rb
@@ -2,7 +2,7 @@ module Quickbooks
   module Service
     class ChangeService < BaseService
 
-      def url_for_query(query = nil, start_position = 1, max_results = 20)
+      def url_for_query(query = nil, start_position = 1, max_results = 20, options = {})  # note: options are currently ignored
         q = entity
         q = "#{q}&#{query}" if query.present?
 
diff --git a/spec/fixtures/json/tax_service_error_dup2.json b/spec/fixtures/json/tax_service_error_dup2.json
new file mode 100644
index 00000000..64a0a7c8
--- /dev/null
+++ b/spec/fixtures/json/tax_service_error_dup2.json
@@ -0,0 +1,16 @@
+{
+"fault": {
+  "error": [
+    {
+      "message": "Duplicate Name Exists Error",
+      "detail": "The name supplied already exists. : null",
+      "code": "6240"
+    }
+  ],
+  "type": "ValidationFault"
+},
+"batchItemResponse": [],
+"attachableResponse": [],
+"time": "1719142418269",
+"cdcresponse": []
+}
diff --git a/spec/lib/quickbooks/service/tax_service_spec.rb b/spec/lib/quickbooks/service/tax_service_spec.rb
index c1838f4a..c52c3443 100644
--- a/spec/lib/quickbooks/service/tax_service_spec.rb
+++ b/spec/lib/quickbooks/service/tax_service_spec.rb
@@ -48,6 +48,15 @@
     }.to raise_error(Quickbooks::IntuitRequestException, /The name supplied already exists/)
   end
 
+  # Empirically observed alternate response from Intuit sandbox
+  it "catch exception if create tax code failed with alternate response" do
+    stub_http_request(:post, url, ["200", "OK"], json_fixture(:tax_service_error_dup2))
+    tax_service.tax_rate_details = tax_rate_details
+    expect {
+      subject.create(tax_service)
+    }.to raise_error(Quickbooks::IntuitRequestException, /The name supplied already exists/)
+  end
+
   it "can not create tax service without tax_code" do
     ts = model.new
     expect {