How I can get the whole souce code of the form on my machine created through the JotForm?

Hi,

If you are asking how to put the updated code to your machine back into your form, unfortunately, it is not possible to upload the form's source code back to JotForm due to security issues.

You will have to host it yourself in your web server.

If this doesn't answer your question, please explain further and/or add more details about it so we can assist you properly.