Hi,

To override the _compute_amounts function with a custom module, you'll need to inherit from the relevant model and then overwrite the function. Here is an example:from odoo import models, api

class SaleOrderInherit(models.Model):

    _inherit = 'sale.order'

    @api.depends('order_line')

    def _compute_amounts(self):

        for order in self:

            if order.quote_template_id.id == 1:               # Apply default calculation logic

                order.amount_total = order.amount_subtotal

            else:

                # Apply default calculation logic

Make sure to replace 'sale.order' with the appropriate model name in your Odoo instance. 

After implementing this code in your custom module, make sure to upgrade your Odoo database.

Hope it helps