In PayPal, you can change the address by going into the "print packing slip" option at the bottom of the of Transaction Summary. The packing slip comes up with an "Edit" option. Click that and in the "your address" section, you can select a different address. Choose the address, then make sure you click the box for "Save the above settings as my Packing Slip preferences". The options in the "your address" section have to be set previously in your shipping settings in PayPal here: www.paypal.com/businessprofile/mytools, "Shipping My Items" section.
**** The problem I'm having is that my old web site address shows up beneath my shipping address and I can't figure out where to change that. I've changed it in my invoice template, but can't find where to change it for my Packing Slip template.
