P&L previous year comparison with details

No, there's no option for that.

In this case, create two Detailed P&L reports and put them side-by-site for comparison.

@VikP 

Consider having a BI app as a workaround.

Or consider a pretty basic feature to be added - there's no reason why I should have to do 6 exports for a six month comparison. REDICULOUS. 

Hello there, @ESL01.

The option to show the prior year and current year when running the Profit and Loss Detail report isn't available in QuickBooks Desktop (QBDT). 

In the meantime, it is best to put forward your suggestions and feedback regarding this option to our product developer. Here's how:

1. Select the Help option, and select Send Feedback Online.
2. Select the Product Suggestion option. A pop-up window displays.
3. Enter your feedback suggestion.
4. Click the Send Feedback button. 

You can always check out these links on how to run and customize your QBDT reports:

• Understand reports.
• Customize reports in QuickBooks Desktop.

I'll be around if you need further assistance when running reports in QuickBooks Desktop. Keep safe!