I received an email that we have almost reached our 1 payment per month. What constitutes a payment on jotform?

Payment Submissions - This is the number of submissions that have payment integrations on them. You can check this guide on how to create a payment/order form. So for example, we have Paypal payment integration on our form, if a user fills out the form, submitted it and successfully completed the payment, then that would be counted as a payment submission. 

Feel free to contact us if you have any other questions.