The last few days I was dealing with a problem of the Paypal integration with the AmdoCraft shop. It is solved now. I had to delete shipping and handling fees from Paypal, but I could not get to the shipping calculator under paypal. The Paypal merchant help desk helped me with providing me with a link:
This option exists but for some reasons, the link to reach the relevant page isn’t showing for Dutch accounts…
You can access it by logging in your Paypal account first and entering that URL normally : https://www.paypal.nl/nl/cgi-bin/webscr?cmd=_profile-shipping
Let me know if that works and if this is what you were looking for.