diff --git a/l10n_pt_account_invoicexpress/models/account_move.py b/l10n_pt_account_invoicexpress/models/account_move.py
index ad9ac463..a5fafc7a 100644
--- a/l10n_pt_account_invoicexpress/models/account_move.py
+++ b/l10n_pt_account_invoicexpress/models/account_move.py
@@ -369,9 +369,15 @@ def create_credit_note(self, lines):
             ],
         })
 
+        # Post and reconcile credit note
         if l10npt_vat_exempt_reason:
             credit_note.action_post()
 
+            outstanding_lines = credit_note.line_ids
+            outstanding_lines = outstanding_lines.filtered(lambda l: float_compare(l.balance, 0.0, 2) < 0)
+            for outstanding_line in outstanding_lines:
+                self.js_assign_outstanding_line(outstanding_line.id)
+
     def _track_subtype(self, init_values):
         res = super()._track_subtype(init_values)
         if "payment_state" in init_values and self.payment_state == "paid":