When viewing the payment tab on a form, you see the following message:
This form has no associated fees.
Note: this verbiage may change from form to form or from organization to organization.
You are expecting to see fees on the Payment tab, but none exist.
In order for the form to include a payment, there must be a rule for a payment. If this message is showing, there are no applicable rules to apply the payment. Please review your form rules and create new rules if needed.