Hi - If you are getting an invalid amount configuration error, then it indicates that the correct form field is not mapped for the Amount option in the Summary settings page. Notes for your reference. Summary settings page allows you to select the relevant fields for the form for the Amount, Discount, Tax, Delivery Fee, Tip, Net amount option. The mapping in the Summary settings allows Neartail to identify the field with the amount to be charged and pass this amount to the selected the payment option such as Stripe or Paypal. If you have mapped a field for the Net amount option, the answer for that field will be passed to Stripe. Otherwise, the answer for the field mapped for the Amount option will be passed to Stripe. You will get an "Invalid amount configuration" error if the Amount, Net amount options are not mapped correctly. How to fix this error in your form? You have to map the "Yoga Class Payment" field for the Amount option in the Summary settings page for your form. Instructions below. Login to Neartail > click on the form to open it > Edit page will be displayed > In the Neartail edit page, click on the form title to select it > click on the gear icon next to the form title > Form settings page will be displayed > Click on the configure key fields icon next to the Save button in the bottom right corner > Summary settings page will be displayed > Select the "Yoga Class Payment" field for the Amount option > click Save. You can then submit a response and test the form.