Thanks for reaching out, @finance81. Happy to have you here.
When filtering your Profit and Loss for specific accounts, it can't calculate a Net Income because you're not totaling all accounts. To get a Net Income total, you'll need to remove all account filters.
For more information, I recommend checking out: Run a Profit and Loss report by bank account in QuickBooks Online
Let me know if you have any other questions by hitting the Reply button below. Have a good one!