Is there any way to add my combined shipping to the pre fill listing
form or is there a way to switch to the advanced once I've entered the
information to be able to add my combined shipping rule?
Them you guys better get on the same page as we were told directly by
eBay execs that gsp would be handled by eBay. Registering a tax ID falls
to the owner of that ID and with gsp that is ebay themselves