I can help share some insights about payroll reports in QuickBooks Online.
If you're pulling up the Employee Details report, the option to select a Report period is unavailable. As a workaround, you can customize the report to show all employees, then export it to Excel. This way, you add details manually.
Here's how:
Click Reports.
Scroll down to the Payroll section and select Employee Details.
Below Employee, choose All Employees.
Hit Run report.
Press the drop-down arrow next to Share.
Click Export To Excel.
However, if its Payroll details, you can select Custom date in the drop-down and change it to the period you need then, select Apply.
You can also check the following article to know more about payroll reports available in QuickBooks: Run payroll reports.
I'll be around to keep helping if you need more help about managing employees.