On my P& L report for a period in 2023 my payroll cost and taxes are included correctly.

Welcome to the Community, @heidi47.

In QuickBooks Online, there are few things to check before running a report to get the correct details. I'll provide the details to review. See the list below.

• Check the payroll transactions and ensure they are correctly categorized.
• Review the employees and payroll items such as wages, taxes, and deductions. Make sure they are set up properly. 
• All employees must have appropriate pay rates and tax information.
• Make sure to choose the correct date range and accounting method in the Profit & Loss report page.

Here are some resources you can check in managing reports in QuickBooks Online:

• Customize reports in QuickBooks Online
• Common custom reports in QuickBooks Online
• Memorize reports in QuickBooks Online

Don't hesitate to comment below if you need further assistance in managing reports in QuickBooks Online. I'm always here to help. Have a great day.