The PayPal Sandbox
As mentioned on their site: "the PayPal Sandbox allows you to test the integration of your PayPal payment solution before submitting transactions to the live PayPal environment. The Sandbox is a duplicate of the live PayPal site, except that no real money changes hands."
We're going to get your form going properly in the sandbox environment before going live.
Before continuing, click here to create a PayPal developer account.