@anand I am now in the process in creating the cash flow. How can I add a menu reports in the account doctype without the desktop menu? would I still create the setup.py
Create config/accounts.py
See erpnext’s config/accounts.py
I think you should put cash flow statement directly into ERPNext instead of a separate app and send a pull request 
@anand Thanks. Nice suggestion but I have a production server to test first the report. If I will follow your suggestion I have to detach first production server to main erpnext git and point it to my fork to test the report. Is my logic correct? 
You can Use a clone of production database to test the report.
Or use your branch on production for final testing by users
@anand ok I will try your suggestion. I am still familiarizing erpnext/erpnext/accounts/report/financial_statements.py my python is still rusty hehehe 