magento-test/app/code/Magento/Config/Test/Mftf/ActionGroup/ResetTaxClassForShippingActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="ResetTaxClassForShippingActionGroup">
        <annotations>
            <description>Goes to the 'Configuration' page for 'Tax'. Sets 'Tax Class for Shipping' to 'None'. Clicks on the Save button. PLEASE NOTE: The value is Hardcoded.</description>
        </annotations>

        <amOnPage url="{{AdminSalesTaxClassPage.url}}" stepKey="navigateToSalesTaxConfigPagetoReset"/>
        <waitForPageLoad stepKey="waitForPageLoad2"/>
        <conditionalClick selector="{{SalesConfigSection.TaxClassesTab}}" dependentSelector="{{SalesConfigSection.CheckIfTaxClassesTabExpand}}" visible="true" stepKey="openTaxClassTab"/>
        <waitForElementVisible selector="{{SalesConfigSection.ShippingTaxClass}}" stepKey="seeShippingTaxClass2"/>
        <selectOption selector="{{SalesConfigSection.ShippingTaxClass}}" userInput="None" stepKey="resetShippingTaxClass"/>
        <checkOption selector="{{SalesConfigSection.EnableTaxClassForShipping}}" stepKey="useSystemValue"/>
        <click selector="{{SalesConfigSection.TaxClassesTab}}" stepKey="collapseTaxClassesTab"/>
        <click selector="{{ContentManagementSection.Save}}" stepKey="saveConfiguration"/>
    </actionGroup>
</actionGroups>