Hide "Closed" tasks on a Project report (PDF)

Hi. First, I just want to thank you for all the work you do on ERPNext. It’s an amazing software!

But I have a bit of a trouble. Me and other employees use the Project module to capture our weekly tasks, and then we send our reports to our supervisors. The report that ERPNext generates looks pretty well, but since our projects now have a lot of task, and some of them aren’t relevant to our supervisors anymore (task that have been already reviewed and have the “Closed” tag), I would like to know a way to have the task list on our report but without showing the tasks who have been already closed.

Thanks in advance!