<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div class="container">
<form id="myForm" action="#">
<div class="form-group">
<label for="email">Email address:</label>
<input type="email" class="form-control" id="email">
</div>
<div class="form-group">
<label for="pwd">Password:</label>
<input type="password" class="form-control" id="pwd">
</div>
<div class="checkbox">
<label><input type="checkbox" id="changeShip"> Show/Hide </label>
</div>
<div id="changeShipInputs">
<div class="form-group">
<label for="city">City</label>
<input type="text" class="form-control" id="city">
</div>
<div class="form-group">
<label for="state">State</label>
<input type="text" class="form-control" id="state">
</div>
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
