whatsapp_web_groups/custom_sat_connection/wizards/account_cfdi_link.py

from odoo import api, fields, models

class AccountCfdiLink(models.TransientModel):
    _name = 'account.cfdi.link'
    _description = 'Vinculación CFDI y asiento contable'
    _rec_name = "cfdi_id"

    cfdi_id = fields.Many2one(comodel_name="account.cfdi", string="CFDI")