Hello Ricardo Gross

Yes, it is possible to create credit notes while returning goods.

when we returns product, system create stock.picking record with value of Reference = "Return of WH/OUT/00016". so we can create automatic action on create new record of stock.picking model to check reference value if it is start with "Return" keyword then get sale_id (default field in stock.picking)

Now sale order do have invoice_ids fiels to get invoice and we can call "reverse_move" of those invoice to crate credit notes.

please check automated action with python code 

# check if action trigger for return order and related sale order has invoice created with payment
if record.origin.startswith('Return of') and record.sale_id.invoice_ids.filtered(lambda move: move.state == 'posted'):
  invoice_ids = record.sale_id.invoice_ids.filtered(lambda move: move.state == 'posted')
  # create refund wizard
  move_reversal = env['account.move.reversal'].with_context(active_model="account.move", active_ids=invoice_ids.ids).create({
            'date': datetime.datetime.today().strftime('%Y-%m-%d'),
            'reason': 'no reason',
            'refund_method': 'refund',
            'journal_id': invoice_ids.journal_id.id,})
  # create revese move
  move_reversal.reverse_moves()
  # get last invoice as credit note
  invoice_refund = record.sale_id.invoice_ids.sorted(key=lambda inv: inv.id, reverse=False)[-1]
  # post credit note  invoice_refund.action_post()

Result:

Thanks & Regards,

​

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I usually solve the problem of automatically generating credit notes after a confirmed return using Automated Actions combined with a small Python script. The key is to make sure that the credit note is only generated after a confirmed return and only for orders that have been invoiced. If you have time, check out https://unblockedgamespremium.io for more details.

Gracias amigo, me funcionó para V17 pero tuve que eliminar #'refund_method': 'refund' ya que ese campo no está disponible en el modelo account.move.reversal