How can I can I view my clients credit card info so that I can run their payments

It's not possible to do that since JotForm does not allow credit card numbers to be stored on  your account, that's an activity that goes against our terms, you can only use Jotform forms to process payments, please find all the needed info about payment forms on this link: https://www.jotform.com/help/chapter-7-Payment+Forms 

If you have questions, let us know.