QB Issue Resolution:

From the home page screen

Go to blue navigation bar on the left
Select Reports
Select “Go to report” (magnifying glass), type Profit
Select “Profit and Loss by Class” from drop-down selector
Optional: Customize the report as needed.

Resolution for Issue 'How do I pull up P&L by class?' available: Yes (Solved).
Source: Intuit Community forum.

How do I pull up P&L by class?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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