for the tax issue, the problem is the way the calculation section of the tax rule is defined.
you have the calculation defined as:
"Taxable subtotal for the cart" Times 0
this will always equal 0, you need to enter the tac rate as a decimal, say 0.05 for 5%:
"Taxable subtotal for the cart" Times 0.05
for the shipping problem, the shipping rule appears correct, add the following code to the confirm page just before the closing </body> tag to output the full request and full response being sent to fed ex:
<?php
session_start();
echo "<p>FedEX: <br />";
echo "Full Request: ".(isset($_SESSION["eCart1_FedEx_FullRequest"])?htmlentities($_SESSION["eCart1_FedEx_FullRequest"]):"n/a")."<br />";
echo "Full Response: ".(isset($_SESSION["eCart1_FedEx_FullResponse"])?htmlentities($_SESSION["eCart1_FedEx_FullResponse"]):"n/a")."<br /></p>";
?>
i can use that info to help troubleshoot the issue.