diff --git a/controllers_v2/finstitutions/payments/base.py b/controllers_v2/finstitutions/payments/base.py
index 95001ee..a09fdd8 100644
--- a/controllers_v2/finstitutions/payments/base.py
+++ b/controllers_v2/finstitutions/payments/base.py
@@ -359,6 +359,15 @@ class PaymentsController(CoreAuthTokenController, ABC):
         if sql_json["status"] == 1: return True
         else: return False
 
+    async def add_sales_line_item(
+            self,
+            sql_conn: AsyncMySQL,
+            mongo_data_conn: AsyncMongo,
+            payment: CorePaymentModel,
+            session_token: str = None
+    ):
+        pass
+
     async def add_sales_transaction(
             self,
             sql_conn: AsyncMySQL,
@@ -376,7 +385,7 @@ class PaymentsController(CoreAuthTokenController, ABC):
         :return: True is the receipt was added, else False.
         """
 
-        # Call the database's procedure:
+        # Add the master entry of the sales transaction:
         sql_json = await self.call_procedure(
             sql_conn = sql_conn,
             proc_name = "sales_transaction_add",
@@ -396,9 +405,56 @@ class PaymentsController(CoreAuthTokenController, ABC):
             alert_on_all_failures = True
         )
 
-        # Return the response:
-        if sql_json["status"] == 1: return True
-        else: return False
+        # If we could not create the master,
+        # we return with failure:
+        if sql_json["status"] != 1: return False
+
+        # We format the line items to a simple array:
+        line_items = []
+        for account_group_id in payment.metadata.againstReference.keys():
+            for line_item in payment.metadata.againstReference[account_group_id]:
+                line_item["accountGroupId"] = account_group_id
+                line_items.append(line_item)
+
+        print("LINE ITEMS:", json.to_string(line_items, default=str))
+
+        # Now we add the line items for each entry:
+        journal_entry_id = sql_json["data"]["sales_id"]
+        success_count = 0
+        total_count = len(line_items)
+        for line_item in line_items:
+            sql_json = await self.call_procedure(
+                sql_conn = sql_conn,
+                proc_name = "sales_transaction_details_add",
+                proc_args = (
+                    payment.user.userId,
+                    payment.user.billingAccountId,
+                    journal_entry_id,
+                    line_item["accountId"],
+                    json.to_string(
+                        python_data = {
+                            "clientId": payment.metadata.idClient,
+                            "accountId": line_item.get("accountId"),
+                            "accountName": line_item.get("accountName"),
+                            "quantity": line_item.get("quantity"),
+                            "uom": line_item.get("uom"),
+                            "unitPrice": line_item.get("unitPrice"),
+                            "hsnCode": line_item.get("hsnCode"),
+                        },
+                        no_space = True
+                    ),
+                    line_item["total"],
+                ),
+                retry_count = 1,
+                backoff_seconds = 0.5,
+                backoff_multiplier = 1.1,
+                session_token = session_token,
+                alert_on_all_failures = True
+            )
+            if sql_json["status"] == 1: success_count += 1
+
+        # Done here:
+        return True if total_count == success_count else False
 
     async def add_event_by_payment_id(
             self,