Let's review the options available to handle shipping in PayPal buttons plugin. From ask the user the shipping address to set an shipping amount.

if you want prompt buyers for a shipping address, PayPal buttons allow the user:

• Prompt for an address, but do not require one.
• Do not prompt for an address.
• Prompt for an address and require one.

The default is Prompt for an address, but do not require one. If you want to change this option:

• Go to Edit Button page
• In the right sidebar settings, go to Shipping Address
• Select an option
• Save the PayPal button

To set a shipping amount follow the next instructions:

• Go to Edit Button page
• In the right sidebar settings, go to Shipping
• Enter amount
• Save the PayPal button