To set up recurring payments for your PayPal Checkout integration, you will need to add a subscriptions enabled field on your form where your PayPal subscription plans are listed.
Set the subscription field as Required or set a Default option, to prevent an error in case the form respondent accidentally leaves it empty.
After adding the subscription-enabled field of your choice, please make sure that the field options you provide are self-explanatory to help the form-filler to understand the plan details.
NOTE: On the Payment Settings page, you are allowed to select only one Subscription-enabled field.
NOTE: When using the Multiple Choice field as your Subscription-enabled field, do not enable the “Allow Other” option.
NOTE: When using the dropdown field to list your PayPal subscription plans, make sure to uncheck the “Use Placeholder” option.