magento-test/app/code/Magento/Tax/Test/Mftf/ActionGroup/AdminCreateTaxRuleActionGroup.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="AdminCreateTaxRuleActionGroup">
        <arguments>
            <argument name="taxRate" type="entity"/>
            <argument name="taxRule" type="entity"/>
        </arguments>
        <!-- Create Tax Rule -->
        <amOnPage url="{{AdminTaxRuleGridPage.url}}" stepKey="goToTaxRulePage"/>
        <waitForPageLoad stepKey="waitForTaxRatePage"/>
        <click selector="{{AdminGridMainControls.add}}" stepKey="addNewTaxRate"/>
        <fillField selector="{{AdminTaxRulesSection.ruleName}}" userInput="{{taxRule.code}}" stepKey="fillRuleName"/>
        <click selector="{{AdminTaxRulesSection.selectTaxRate(taxRate.code)}}" stepKey="selectTaxRate"/>
        <click selector="{{AdminTaxRuleFormSection.additionalSettings}}" stepKey="clickAdditionalSettings"/>
        <fillField userInput="{{taxRule.priority}}" selector="{{AdminTaxRuleFormSection.priority}}" stepKey="fillPriority"/>
        <fillField userInput="{{taxRule.position}}" selector="{{AdminTaxRuleFormSection.sortOrder}}" stepKey="fillPosition"/>
        <waitForLoadingMaskToDisappear stepKey="waitForLoading"/>
        <click selector="{{AdminStoresMainActionsSection.saveButton}}" stepKey="clickSave"/>
    </actionGroup>
</actionGroups>