there is a missing end quotation marker in beginning
I would recommend somthing like the following code.
With only very small adjustments made by me:
<?php
include ("header.php");
print "<h4><u>Select shipping choice</u></h4>";
?>
<form action="confirm.php" method="post">
<table border="1">
<tr>
<td>Shipping choice:</td>
<td><select name="shipper">
<option value="UPS">USPS</option>
<option value="FedEX">FedEx</option>
</select></td></tr>
<tr>
<td></td>
<td><input type="submit" value="Insert"></td></tr>
<tr>
<td></td>
<td><input type="reset" value="Reset"></td></tr>
</table>
</form>
</body>
</html>