Credit Card Authourization Forms

With jotform do I have the ability to upload documents and edit them or on jotform? 

Then collect electronic signatures?  

Unfortunately, there is no option to edit the documents that have been uploaded through your form. But you can download the submitted files and then you can update it on your local computer. But please take note that you cannot collect credit card details through your forms. If you wish to receive authorization payments through cards, you will need to make use of services like Paypal or Authorize.net. Otherwise, there is high chance that your account may be suspended.

With collecting signatures, yes, you may do so by adding a signature widget. You can check this guide to know how: https://www.jotform.com/help/433-How-to-Add-an-E-Signature-to-Your-Form

If you have questions, please let us know.