old_contents: from odoo import fields, models
  
  
  class SubscriptionRequest(models.Model):
      _inherit = 'subscription.request'
  
      company_type = fields.Selection([('scrl', 'SCRL'),
                                       ('asbl', 'ASBL'),
                                       ('sprl', 'SPRL'),
                                       ('sa', 'SA')])
  
      def get_partner_company_vals(self):
          vals = super(SubscriptionRequest).get_partner_company_vals()
          vals['out_inv_comm_algorithm'] = 'random'
          return vals
  
      def get_partner_vals(self):
          vals = super(SubscriptionRequest).get_partner_vals()
          vals['out_inv_comm_type'] = 'bba'
          vals['out_inv_comm_algorithm'] = 'random'
          return vals
  
      def get_representative_valst(self):
          vals = super(SubscriptionRequest).get_representative_vals()
          vals['out_inv_comm_type'] = 'bba'
          vals['out_inv_comm_algorithm'] = 'random'
          return vals
  
new_contents: from odoo import fields, models
  
  
  class SubscriptionRequest(models.Model):
      _inherit = 'subscription.request'
  
      company_type = fields.Selection([('scrl', 'SCRL'),
                                       ('asbl', 'ASBL'),
                                       ('sprl', 'SPRL'),
                                       ('sa', 'SA')])
  
      def get_partner_company_vals(self):
          vals = super(SubscriptionRequest, self).get_partner_company_vals()
          vals['out_inv_comm_algorithm'] = 'random'
          return vals
  
      def get_partner_vals(self):
          vals = super(SubscriptionRequest, self).get_partner_vals()
          vals['out_inv_comm_type'] = 'bba'
          vals['out_inv_comm_algorithm'] = 'random'
          return vals
  
      def get_representative_valst(self):
          vals = super(SubscriptionRequest, self).get_representative_vals()
          vals['out_inv_comm_type'] = 'bba'
          vals['out_inv_comm_algorithm'] = 'random'
          return vals
  
subject: add missing self in super call