Where exactly are you looking to include this PayPal link in? This is an important detail to have so we can make sure we are providing the correct information! Though if you're looking to include this link in an email through our Third Generation Editor? If so I apologize being able to add PayPal buttons for payments/donations in these emails is not a feature that is currently available. It is however a feature request we are still collecting feedback on. As a workaround we suggest generate a link directly through Paypal. You can then take this link and put into an email through a button!