from odoo import fields, models from odoo.addons.l10n_gr_edi.models.preferred_classification import TAX_EXEMPTION_CATEGORY_SELECTION class AccountTax(models.Model): _inherit = "account.tax" l10n_gr_edi_default_tax_exemption_category = fields.Selection( selection=TAX_EXEMPTION_CATEGORY_SELECTION, string='Default Tax Exemption Category', )