Enable the PayPal Integration feature in your account to accept PayPal as a payment method in your Commerce web store. An Administrator, or someone with Setup permission, can go to Setup > Enable Features. Click the Transactions subtab, and then check the box next to PayPal Integration.
Setting up a successful integration includes entering the API provided by NetSuite into your PayPal merchant account.
PayPal requires Transport Security Layer (TLS) 1.2 for all HTTPS connections. If a user attempts to access PayPal payment systems using a browser that does not have TLS 1.2 enabled, the requested PayPal page does not load. To fix this issue, users should use a browser that supports TLS 1.2 and has TLS 1.2 enabled in browser settings.