newsupernova/vendor/magento/module-tax-import-export/etc/adminhtml/menu.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Backend:etc/menu.xsd">
    <menu>
        <add id="Magento_TaxImportExport::system_convert_tax" title="Import/Export Tax Rates" sortOrder="30" module="Magento_TaxImportExport" parent="Magento_Backend::system_convert" action="tax/rate/importExport" resource="Magento_TaxImportExport::import_export"/>
    </menu>
</config>