fix: Test Case
diff --git a/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py b/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py
index fa33541..fef73d9 100644
--- a/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py
+++ b/erpnext/regional/doctype/gstr_3b_report/test_gstr_3b_report.py
@@ -176,7 +176,7 @@
 			do_not_save=1
 		)
 
-	pi1.place_of_supply = "29-Karnataka"
+	pi1.shipping_address = "_Test Supplier GST-1-Billing"
 	pi1.save()
 
 	pi1.submit()
@@ -221,6 +221,7 @@
 			"link_name": "_Test Registered Supplier"
 		})
 
+		address.is_shipping_address = 1
 		address.save()
 
 	if not frappe.db.exists('Address', '_Test Supplier GST-2-Billing'):