JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" class="cbox" name="FBchecks[]" value="Facebook Ad MGMT" id="FBmngCH">
    <label for="test">Facebook Ad Management</label>
    <ul id="FBmngList">
        <li>
            <input type="radio" name="adManage" value="Ad Management 1" id="adMan1">
            <label for="adMan1">Ad Fund - 1</label>
        </li>
        <li>
            <input type="radio" name="adManage" value="Ad Management 2" id="adMan2">
            <label for="adMan2">Ad Fund - 2</label>
        </li>
        <li>
            <input type="radio" name="adManage" value="Ad Management 3" id="adMan3">
            <label for="adMan3">Ad Fund - 3</label>
        </li>
        <li>
            <input type="radio" name="adManage" value="Ad Management 4" id="adMan4">
            <label for="adMan4">Ad Fund - 4</label>
        </li>
        <div id="FBADerror" class="acctError"></div>
    </ul>

JavaScript

$FBmngCH = $("#FBmngCH");
$FBmngList = $("#FBmngList");

//hide FB Management List
$FBmngList.hide();

//on FB Management select
$FBmngCH.click(function() {
    //toggle FB Management List
    $FBmngList.toggle();
    if (!$FBmngList.attr('checked')) {
        $FBmngList.find('input:checked').attr('checked', false);
    }
});

$FBadValid = false;
$FBADerror = $("#FBADerror");

//if FB Ad Management is checked
if ($FBmngCH.attr('checked')) function validateFB() {
   $("input[name=adManage]").each(function () {   //LoopingthroughradioButtons
    // "this" is the current element(radio) in the loop
      if ($(this).is(':checked')) {
            $FBadValid = true; //Radio Button is Checked);
      }

      if ($FBadValid.attr = true ) {
            $FBADerror.empty();
      }
   });
};
if ($FBmngCH.blur($FBadValid.attr = false)) {
    $FBADerror.append("<li> Please select a Facebook Ad plan. </li>");
    //appends error to document
}   
if ($FBmngCH.blur($FBmngCH.not('checked'))) {
    $("input[name=adManage]").each(function () {
        if ($(this).is(':checked')) {
            $("input[name=adManage]").removeAttr('checked');
        }
    });
    //remove checks from radios
};  
$("input[name=adManage]").click(validateFB);