diff --git a/lib/quickbooks/model/invoice.rb b/lib/quickbooks/model/invoice.rb
index c044e3bf..1c03dd53 100644
--- a/lib/quickbooks/model/invoice.rb
+++ b/lib/quickbooks/model/invoice.rb
@@ -14,6 +14,7 @@ class Invoice < BaseModel
 
       #== Constants
       REST_RESOURCE = 'invoice'
+      MINORVERSION = 1
       XML_COLLECTION_NODE = "Invoice"
       XML_NODE = "Invoice"
       EMAIL_STATUS_NEED_TO_SEND = 'NeedToSend'
diff --git a/lib/quickbooks/model/sales_item_line_detail.rb b/lib/quickbooks/model/sales_item_line_detail.rb
index bf683846..37826637 100644
--- a/lib/quickbooks/model/sales_item_line_detail.rb
+++ b/lib/quickbooks/model/sales_item_line_detail.rb
@@ -9,6 +9,7 @@ class SalesItemLineDetail < BaseModel
       xml_accessor :quantity, :from => 'Qty', :as => BigDecimal, :to_xml => Proc.new { |val| val.to_f }
       xml_accessor :tax_code_ref, :from => 'TaxCodeRef', :as => BaseReference
       xml_accessor :service_date, :from => 'ServiceDate', :as => Date
+      xml_accessor :tax_inclusive_amount, :from => 'TaxInclusiveAmt', :as => BigDecimal, :to_xml => Proc.new { |val| val.to_f }
 
       reference_setters :item_ref, :class_ref, :price_level_ref, :tax_code_ref
     end
diff --git a/lib/quickbooks/service/invoice.rb b/lib/quickbooks/service/invoice.rb
index 32416edf..80d8cb1d 100644
--- a/lib/quickbooks/service/invoice.rb
+++ b/lib/quickbooks/service/invoice.rb
@@ -6,6 +6,21 @@ def delete(invoice)
         delete_by_query_string(invoice)
       end
 
+      def url_for_resource(resource)
+        url = super(resource)
+        "#{url}?minorversion=#{Quickbooks::Model::Invoice::MINORVERSION}"
+      end
+
+      def fetch_by_id(id, params = {})
+        url = "#{url_for_base}/invoice/#{id}?minorversion=#{Quickbooks::Model::Invoice::MINORVERSION}"
+        fetch_object(model, url, params)
+      end
+
+      def url_for_query(query = nil, start_position = 1, max_results = 20, options = {})
+        url = super(query, start_position, max_results, options)
+        "#{url}&minorversion=#{Quickbooks::Model::Invoice::MINORVERSION}"
+      end
+
       def send(invoice, email_address=nil)
         query = email_address.present? ? "?sendTo=#{email_address}" : ""
         url = "#{url_for_resource(model::REST_RESOURCE)}/#{invoice.id}/send#{query}"