from odoo import fields, models, api class AccountMoveLine(models.Model): _inherit = "account.move.line" l10n_in_withhold_tax_amount = fields.Monetary(string="TDS Tax Amount", compute='_compute_withhold_tax_amount') @api.depends('tax_ids') def _compute_withhold_tax_amount(self): # Compute the withhold tax amount for the withholding lines withholding_lines = self.filtered('move_id.l10n_in_is_withholding') (self - withholding_lines).l10n_in_withhold_tax_amount = False for line in withholding_lines: line.l10n_in_withhold_tax_amount = line.currency_id.round(abs(line.price_total - line.price_subtotal))