Add existing user attribute fields to the Payment Details section of the payment form and optionally make them mandatory.

1. In the Payment Details section, select Add a User Attribute.
2. In the User Attribute dialog box, do one of the following:

   • To add a single field, select Add for the required user attribute.

   • To add multiple fields, select the required user attributes and then select Add Selected.

3. Verify that the selected user attribute fields are displayed in the Payment Details screen.
4. Optional: To make a field mandatory, enable the Required toggle for the corresponding user attribute. For more information about user attributes, see the User Attributes documentation.