<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> <!------ Include the above in your HEAD tag ----------> When you buy products from China, you are, thus, importing from China. These imported products are then subject to import taxes. So <a href="https://shipcustomerdirect.com/overseas-supplier-requesting-tax-identification-number-ein/">Import Tax Id</a> is required for the legal entry of the products that are priced above $2500 when it enters the US from overseas. For more information, you can visit here.