JSFiddle - React, Tailwind, and code Playground

HTML

<div id='query'>
    <div style='float: left; text-align: right;'>Want this right justified above Download button
        <br />
        <input type="submit " class="submit " name="submit_preview " value="Generate Report "></input>
        <input type="submit " class="submit " name="submit_download " value="Download Table "></input>
    </div>
</div>

CSS

#query {
    border-bottom: 1px solid #aaa;
    margin-bottom: 1em;
    padding: .5em 0em;
}