How can I test out the payment process with Square?

I have created a boarding school fair registration form. I connected with our school's Square account for payment. I set it as a test mode for now. I would like to send payment receipt to the customer, but only the general admission email address is available for me to select. I would like to know how I can use attendee email address to send payment receipt.

How can I test the payment process without actually charging to my credit card?

Here is the form for you to review. https://www.jotform.com/build/73305737432152. Thank you for your help!

Just set the Test Mode to Yes in your Square payment settings then use this test cards from Square when you make a test submission in your form.

https://docs.connect.squareup.com/articles/using-sandbox#sandbox-special-values

To send the receipt from Square, you will have to configure that within your Square account.

https://squareup.com/help/us/en/article/5070-send-digital-receipts

If you want to send a copy of the customer's data along with their payment info, simply use an autoresponder then set the email field as the recipient. http://www.jotform.com/help/26-Creating-a-Form-Autoresponder