Thanks for the prompt response, @TRBurns.

I hear you and appreciate the feedback regarding the P&L Comparison report in QuickBooks Online. 

The number of days in the custom date range or selected period will then be used to calculate the previous period for comparison, which may not be a full month. Rest assured, I’m passing your idea along here on my end for consideration in the near future.

A suggestion like this is very important for us to know how we can be even better. In the meantime, I recommend visiting our QuickBooks Online Blog to know about the recent news, features, and updates on QBO and what our Product Team is working on. 

That should do it. Please know that I’m always here to help should you need further assistance. Wishing you and your business continued success!