It only allows me to change my Primary Post Address. What I need to change is my Primary Post From Address.

well in mine it gives 4 options - did you choose edit or any drop down menu?

There's an option for me to add new addresses etc, but there's no tool to specify that one is a Post-From address.

I've changed my Registration address, Primary postage address and Primary return address through the addresses section as other posts have suggested but can not change Post-From Address.

 

Help!

Maybe try deleting the post from address and then put a new one in.

I don't have the post from address option on this ID, I presume because I have never sold anything on it.

Try printing a packing slip or invoice, edit the ship from address and then save as your new default address.

 

If that doesn't work then try this link

http://payments.ebay.com.au/ws/eBayISAPI.dll?UserAddresses&cmd=standalone&addresstype=shipment_from