**Impacted versions:** 11.0

**Steps to reproduce:** 

- Configures a user with access to several companies


![administrator odoo](https://user-images.githubusercontent.com/5775695/29488651-46b4cec2-84dd-11e7-9495-e8518e93d336.png)

**Current behavior:**

- In the accounting configuration there is shared field displayed by defects for the sales tax account and purchase tax account
![configure accounting odoo 1](https://user-images.githubusercontent.com/5775695/29488677-f5b53d12-84dd-11e7-8124-831b52423719.png)


**Expected behavior:**

The value of those fields depends on the company. The users that belong to different companies may see by default different values for the field on a given record

Video/Screenshot link (optional):


cash_account_code_prefix = fields.Char('Cash Accounts Prefix')
    code_digits = fields.Integer(string='# of Digits', required=True, help="No. of Digits to use for account code")
    sale_tax_id = fields.Many2one('account.tax.template', string='Default Sales Tax', oldname="sale_tax")
    purchase_tax_id = fields.Many2one('account.tax.template', string='Default Purchase Tax', oldname="purchase_tax")
    sale_tax_rate = fields.Float(string='Sales Tax(%)')
    use_anglo_saxon = fields.Boolean(string='Use Anglo-Saxon Accounting', related='chart_template_id.use_anglo_saxon')
    transfer_account_id = fields.Many2one('account.account.template', required=True, string='Transfer Account',
        domain=lambda self: [('reconcile', '=', True), ('user_type_id.id', '=', self.env.ref('account.data_account_type_current_assets').id)],
        help="Intermediary account used when moving money from a liquidity account to another")
    purchase_tax_rate = fields.Float(string='Purchase Tax(%)')
    complete_tax_set = fields.Boolean('Complete Set of Taxes',
        help="This boolean helps you to choose if you want to propose to the user to encode the sales and purchase rates or use "
            "the usual m2o fields. This last choice assumes that the set of tax defined for the chosen template is complete")
    @api.model
    def _get_chart_parent_ids(self, chart_template):
        """ Returns the IDs of all ancestor charts, including the chart itself.
            (inverse of child_of operator)
            :param BaseModel chart_template: the account.chart.template record
            :return: the IDS of all ancestor charts, including the chart itself.
        """
        result = [chart_template.id]
        while chart_template.parent_id:
            chart_template = chart_template.parent_id
            result.append(chart_template.id)
        return result
    @api.onchange('sale_tax_rate')
    def onchange_tax_rate(self):
        self.purchase_tax_rate = self.sale_tax_rate or False
    @api.onchange('chart_template_id')
    def onchange_chart_template_id(self):