Hello NP-Treasurer,
The P&L Standard report summarizes the total income and expenses of your business at a specific time. It means that all of your income and expense transactions recorded in QuickBooks Desktop (QBDT) will post to this report. That said, it's possible that there are no transactions with class from July until end of last year.
For more tips about running and customizing your QBDT reports, you can open these articles:
Aside from that, you can also get more resources while handling your customer and vendor transactions through these links:
Get back to us here if you have other questions or concerns. I'm always here to help.