(self, company_id, sale_tax_rate, purchase_tax_rate)
return True
This function checks if this chart template is configured as containing a full set of taxes, and if
        it's not the case, it creates the templates for account.tax object accordingly to the provided sale/purchase rates.
        Then it saves the new tax templates as default taxes to use for this chart template.

        :param company_id: id of the company for which the wizard is running
        :param sale_tax_rate: the rate to use for created sales tax
        :param purchase_tax_rate: the rate to use for created purchase tax
        :return: True
This function checks if this chart template is configured as containing a full set of taxes, and if
        it's not the case, it creates the templates for account.tax object accordingly to the provided sale/purchase rates.
        Then it saves the new tax templates as default taxes to use for this chart template.
This function checks if this chart template is configured as containing a full set of taxes and if it s not the case it creates the templates for account . tax object accordingly to the provided sale / purchase rates . Then it saves the new tax templates as default taxes to use for this chart template .
def _create_tax_templates_from_rates(self, company_id, sale_tax_rate, purchase_tax_rate):
        '''
        This function checks if this chart template is configured as containing a full set of taxes, and if
        it's not the case, it creates the templates for account.tax object accordingly to the provided sale/purchase rates.
        Then it saves the new tax templates as default taxes to use for this chart template.

        :param company_id: id of the company for which the wizard is running
        :param sale_tax_rate: the rate to use for created sales tax
        :param purchase_tax_rate: the rate to use for created purchase tax
        :return: True
        '''
        self.ensure_one()
        obj_tax_temp = self.env['account.tax.template']
        all_parents = self._get_chart_parent_ids()
        # create tax templates from purchase_tax_rate and sale_tax_rate fields
        if not self.complete_tax_set:
            ref_taxs = obj_tax_temp.search([('type_tax_use', '=', 'sale'), ('chart_template_id', 'in', all_parents)], order="sequence, id desc", limit=1)
            ref_taxs.write({'amount': sale_tax_rate, 'name': _('Tax %.2f%%') % sale_tax_rate, 'description': '%.2f%%' % sale_tax_rate})
            ref_taxs = obj_tax_temp.search([('type_tax_use', '=', 'purchase'), ('chart_template_id', 'in', all_parents)], order="sequence, id desc", limit=1)
            ref_taxs.write({'amount': purchase_tax_rate, 'name': _('Tax %.2f%%') % purchase_tax_rate, 'description': '%.2f%%' % purchase_tax_rate})
        return True
def _create_tax_templates_from_rates ( self , company_id , sale_tax_rate , purchase_tax_rate ) : self . ensure_one ( ) obj_tax_temp = self . env [ 'account.tax.template' ] all_parents = self . _get_chart_parent_ids ( ) # create tax templates from purchase_tax_rate and sale_tax_rate fields if not self . complete_tax_set : ref_taxs = obj_tax_temp . search ( [ ( 'type_tax_use' , '=' , 'sale' ) , ( 'chart_template_id' , 'in' , all_parents ) ] , order = "sequence, id desc" , limit = 1 ) ref_taxs . write ( { 'amount' : sale_tax_rate , 'name' : _ ( 'Tax %.2f%%' ) % sale_tax_rate , 'description' : '%.2f%%' % sale_tax_rate } ) ref_taxs = obj_tax_temp . search ( [ ( 'type_tax_use' , '=' , 'purchase' ) , ( 'chart_template_id' , 'in' , all_parents ) ] , order = "sequence, id desc" , limit = 1 ) ref_taxs . write ( { 'amount' : purchase_tax_rate , 'name' : _ ( 'Tax %.2f%%' ) % purchase_tax_rate , 'description' : '%.2f%%' % purchase_tax_rate } ) return True