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-rw-r--r--lib/super_good/solidus_taxjar/api_params.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/super_good/solidus_taxjar/api_params.rb b/lib/super_good/solidus_taxjar/api_params.rb
index 25f8317..3d898c3 100644
--- a/lib/super_good/solidus_taxjar/api_params.rb
+++ b/lib/super_good/solidus_taxjar/api_params.rb
@@ -28,7 +28,7 @@ module SuperGood
.merge(
transaction_id: order.number,
transaction_date: order.completed_at.to_formatted_s(:iso8601),
- amount: order.total - order.additional_tax_total,
+ amount: [order.total - order.additional_tax_total, 0].max,
shipping: shipping(order),
sales_tax: order.additional_tax_total
)