First thing to do is choose the appropriate report you are looking to run:

Then click the date range once it shows up:

Then Choose Custom after you've click the date range:

Then you will choose the dates you want to pull the report for (ex. click 10/10 once and then click 10/31 once. This will choose the range you are interested in running that report). One other thing to note here, when you choose any date on the customer tab (ex. July 1) and you change the month to your current date, have no fear as it will remember your date range.

Then hit :

At that point, it will then pull the report you've chosen as a date range which you can then export out to see the results, or view online.