Hi jasonm12434.
Thanks for posting here in the Community, I'd be happy to shed some light on this. If you head to the Reports Center under Reports. And open the desired report you want to view, there is a report period listed. Usually the default setting is This year-to-date. You can change that to This Month or a desired month. Once done, you can generate the report and it will include all necessary info for that time frame.
I'm also including a helpful article on how to customize reports in QBDT for Mac.
if you have any other questions, feel free to post below. Thank you for your time and have a nice evening.