Can I use Square, or another payment accepting option with your Forms?

Yes, you may use any of the available payment integrations on the form.

https://www.jotform.com/help/165-setting-up-your-first-order-form

https://www.jotform.com/help/323-mastering-payment-form-integrations-with-jotform

Let us know if you have further questions.

Thanks.