in the tax rule, you had been using:
but in your case the checkout form was using the name "WASF_CheckoutWizard_NewFromBlank_Default"
so i updated the session to:
for USPS shipping, I added code to the checkout page to write the session contents:
<pre><?php var_dump($_SESSION); ?></pre>
the response from USPS in the session is:
80040B1AAuthorization failure. Perhaps username and/or password is incorrect.USPSCOM::DoAuth"
the user ID you entered for USPS Shipping is not being accepted by the USPS server.