magento-test/app/code/Magento/Weee/etc/adminhtml/system.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_Config:etc/system_file.xsd">
    <system>
        <section id="tax">
            <group id="weee" translate="label" sortOrder="100" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Fixed Product Taxes</label>
                <field id="enable" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Enable FPT</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
                <field id="display_list" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Display Prices In Product Lists</label>
                    <source_model>Magento\Weee\Model\Config\Source\Display</source_model>
                    <depends>
                        <field id="enable">1</field>
                    </depends>
                </field>
                <field id="display" translate="label" type="select" sortOrder="20" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Display Prices On Product View Page</label>
                    <source_model>Magento\Weee\Model\Config\Source\Display</source_model>
                    <depends>
                        <field id="enable">1</field>
                    </depends>
                </field>
                <field id="display_sales" translate="label" type="select" sortOrder="30" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Display Prices In Sales Modules</label>
                    <source_model>Magento\Weee\Model\Config\Source\Display</source_model>
                    <depends>
                        <field id="enable">1</field>
                    </depends>
                </field>
                <field id="display_email" translate="label" type="select" sortOrder="40" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Display Prices In Emails</label>
                    <source_model>Magento\Weee\Model\Config\Source\Display</source_model>
                    <depends>
                        <field id="enable">1</field>
                    </depends>
                </field>
                <field id="apply_vat" translate="label" type="select" sortOrder="60" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Apply Tax To FPT</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                    <depends>
                        <field id="enable">1</field>
                    </depends>
                </field>
                <field id="include_in_subtotal" translate="label" type="select" sortOrder="70" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Include FPT In Subtotal</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                    <depends>
                        <field id="enable">1</field>
                    </depends>
                </field>
            </group>
        </section>
        <section id="sales">
            <group id="totals_sort">
                <field id="weee" translate="label" type="text" sortOrder="4" showInDefault="1" showInWebsite="1" canRestore="1">
                    <label>Fixed Product Tax</label>
                    <validate>required-number validate-number</validate>
                </field>
            </group>
        </section>
    </system>
</config>