Square: How are payments processed?

Problem 2: I currently use square and would like to integrate square to this .

How is the credit card number entered?  can i still use the square magnetic stripe?

It's possible to integrate your form with Sqaure, but for the payments you users will need to manually enter the credit card information on the form before to submit it. 

Please find more info on the following links: 

https://www.jotform.com/blog/246-Process-Square-Payments-Online-with-JotForm 

https://www.jotform.com/help/459-How-to-Integrate-Form-with-Square 

If you have questions, let us know.