odoo16/addons/pos_loyalty/models/loyalty_reward.py

# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from odoo import models

class LoyaltyReward(models.Model):
    _inherit = 'loyalty.reward'

    def _get_discount_product_values(self):
        res = super()._get_discount_product_values()
        for vals in res:
            vals.update({'taxes_id': False})
        return res