If you do not already have a PayPal account, please use the link below to create one:
https://www.paypal.com/us/home
To fill in your PayPal client ID, look up its location using a quick Google search or ask your CRM administrator for assistance. The same goes for your PayPal secret ID.
Once you have provided all the necessary information, remember to save it before proceeding.
If you've developed a new product and would like to test it without accidentally charging yourself, use "sandbox" mode.