fix: GST on freight charge in e-invoicing (#25000)

* fix: GST on freight charge in e-invocing

* fix: Add patch for taxable value field

* fix: Handle discounts on net total

* fix: Handle all types of discounts for e-invoicing

* fix: Absolute taxable values

* fix: Use correct tax amount

erpnext/hooks.py

@@ -262,7 +262,8 @@ doc_events = {
 		],
 		"on_trash": "erpnext.regional.check_deletion_permission",
 		"validate": [
-			"erpnext.regional.india.utils.validate_document_name"
+			"erpnext.regional.india.utils.validate_document_name",
+			"erpnext.regional.india.utils.update_taxable_values"
 		]
 	},
 	"Purchase Invoice": {