I created credit note and i need to show it in the invoice smart button of sale order and link it with sale order
credit_note=self.env['account.move'].create({
'move_type': 'out_refund',
'invoice_origin': picking_id.name,
'invoice_user_id': current_user,
'narration': picking_id.name,
'partner_id': picking_id.partner_id.id,
'currency_id': picking_id.env.user.company_id.currency_id.id,
'ref': _('Reversal for: %s') % self.reason.name if self.reason else '',
'date': self.date or False,
'invoice_date': self.date or False,
'journal_id': self.journal_id and self.journal_id.id or False,
'invoice_line_ids': invoice_line_list,
})