from odoo import fields, models from odoo.addons.l10n_sa.models.account_move import ADJUSTMENT_REASONS class AccountDebitNote(models.TransientModel): _inherit = 'account.debit.note' l10n_sa_reason = fields.Selection(string="ZATCA Reason", selection=ADJUSTMENT_REASONS) def _prepare_default_values(self, move): return { **super()._prepare_default_values(move), "l10n_sa_reason": self.l10n_sa_reason, }