Time for action – installing the PayPal module
Here is how to do it:
In your PrestaShop control panel, hover on Modules and click on the Payments & Gateways option. Then install the PayPal (Addons) module.
Now click on Configure next to the PayPal module you just installed. Here is a screenshot of what you will see:
PayPal business e-mail simply refers to the e-mail address used on your PayPal account. So put that in there.
Select No for Sandbox mode. We want to do this for real.
Go to the main profile page by clicking on the Profile tab. Under the Selling preferences column, click on Website Payment Preferences. Make sure Auto Return and Payment Data Transfer are set to Off. These settings are turned off because PrestaShop communicates directly with PayPal to configure these options. Do not be concerned if you think these settings should be on.
What just happened?
You told PrestaShop to use PayPal. You then gave it the payment e-mail required by PayPal. Then we clicked a few boxes...