When setting up recurring payments with PayPal Checkout for your form, you will require the Plan ID. Please follow the instructions below on how to locate the Plan ID if you have a PayPal Business account:
Log into your PayPal business account.
Go to the “Pay & Get Paid” tab and click “Subscriptions” under the Accept Payments section
The 'Manage Subscriptions' screen will open up. Go to 'Subscription Plans' tab.
Under the 'Plan' column, you will see the Plan ID (starting with P) and the Plan name in each row.
Copy the 'Plan ID'