nvoicing laravel app documentation

This job is for IT people with documentation and qa testing skills. I need TO CREATE documentation for this app. I don't own the code, i just purchased a copy. And I have the source code of a copy what was modified for another freelancer. [login to view URL] The freelancer needs to test the application, to fill forms with dummy data to see how it works, then take screenshots and finally write it in a html file, with a look like this: [login to view URL] Finally, while you were writing the manual, i need also you will be building the process flow diagram in a tool like [login to view URL] or similar to see how the program looks like it works internally seeing the diagram, and make the plan for my modified script. I'll need editable files for process flow diagram so that's why i need them in a tool like [login to view URL] I need the work to be done before monday. Thank you.