discounts

Author: u11d-michal-miler

README.md

@@ -101,6 +101,7 @@ module.exports = defineConfig(
 > - The example above will use `PC040100` for each product. See [Advanced Usage](#advanced-usage) for assigning specific tax codes to individual products
 > - The plugin automatically syncs your Medusa stock locations with Avalara locations on startup for accurate tax calculations. However, since Medusa doesn't emit events for stock location changes, if you create or update a location after startup, you'll need to either restart the app or manually call `POST /admin/avalara-cache/feed` to refresh the cache
 > - The plugin fully supports tax-inclusive pricing and automatically respects the region's tax-inclusive preferences
+> - Discounts should be used with caution. Medusa does not use the exact tax amounts returned by Avalara but instead calculates taxes using the rates provided, which may lead to minor differences in final tax calculations when discounts are applied.
 
 ### 3. Run Database Migration
 

src/workflows/create-avalara-transaction.ts

@@ -30,6 +30,7 @@ const fetchDataStep = createStep(
     const order = await orderService.retrieveOrder(orderId, {
       relations: [
         "items",
+        "items.adjustments",
         "shipping_methods",
         "billing_address",
         "shipping_address",
@@ -78,7 +79,13 @@ const createAvalaraTransactionStep = createStep(
           line_item: {
             id: item.id,
             product_id: item.product_id || "",
-            unit_price: item.unit_price,
+            unit_price:
+              item.unit_price -
+              (item.adjustments?.reduce(
+                (acc, adj) => acc + Number(adj.amount),
+                0
+              ) || 0) /
+                item.quantity,
             quantity: item.quantity,
             currency_code: order.currency_code,
           },