from odoo import models, fields class ProductTemplate(models.Model): _inherit = 'product.template' l10n_pl_vat_gtu = fields.Selection( string='GTU Codes', selection=[ ('GTU_01', 'GTU_01 - Alcoholic beverages'), ('GTU_02', 'GTU_02 - Goods referred to under Art. 103 sec 5aa'), ('GTU_03', 'GTU_03 - Fuel oil for excise duty, lubricating oils and other oils'), ('GTU_04', 'GTU_04 - Tobacco products, tobacco, e-liquid'), ('GTU_05', 'GTU_05 - Wastes'), ('GTU_06', 'GTU_06 - Electronic devices, their parts and materials'), ('GTU_07', 'GTU_07 - Vehicles and vehicle parts'), ('GTU_08', 'GTU_08 - Precious metals and base metals'), ('GTU_09', 'GTU_09 - Medicament and medical devices, medicinal products'), ('GTU_10', 'GTU_10 - Buildings, structures and land'), ('GTU_11', 'GTU_11 - Services related to the greenhouse gas emission allowance trading'), ('GTU_12', 'GTU_12 - Intangible services'), ('GTU_13', 'GTU_13 - Transport services and warehouse management services'), ], help='Codes for specific types of products, needed for VAT declaration' )