Hi - I wonder if its possible to extract historical cashflow statement by month i.e. full year showing month by month?

Yes, it's possible, murtaza.

We can pull up the Statement of Cash Flows report and customize it to get the information we need. Here's how:

1. Go to the Reports tab, select Statement of Cash Flows.
2. Click the Customize button.
3. Change the desired Report period date.
4. Click the Rows/Columns arrow and select Months.
5. Click Run Report.

Now, we can have the desired statement by month. 

Here's an article to learn more additional information about running reports in QBO: Run reports.

Please let me know if you need more help with managing reports in QuickBooks. I'm always here to help.