More hacks to handle zero dollar orders

I have a plan for how to handle these better in v1.0 though!

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/super_good/solidus_taxjar/api_params.rb b/lib/super_good/solidus_taxjar/api_params.rb
index ca346ff..53b2c81 100644
--- a/lib/super_good/solidus_taxjar/api_params.rb
+++ b/lib/super_good/solidus_taxjar/api_params.rb
@@ -85,7 +85,7 @@ module SuperGood
                 product_tax_code: line_item.tax_category&.tax_code,
                 unit_price: line_item.price,
                 discount: discount(line_item),
-                sales_tax: line_item.additional_tax_total
+                sales_tax: line_item_sales_tax(line_item)
               }
             end
           }
@@ -112,6 +112,12 @@ module SuperGood
 
           order.additional_tax_total
         end
+
+        def line_item_sales_tax(line_item)
+          return 0 if line_item.order.total.zero?
+
+          line_item.additional_tax_total
+        end
       end
     end
   end