How do I preview the payroll I just finished for my employees?

I'll route you to the page where you can review and edit your payroll, Gail. Ensuring you'll be able to put correct hours for your employees. 

You can review the payroll and input accurate hours for your employees through the Payroll menu in QuickBooks Online (QBO).

Here's how: 

1. On the left panel, go to the Payroll menu.
2. Select the Run payroll option in the Shortcuts section.
3. In the Run Payroll page, go to the lower right corner of the screen to select the Preview payroll button.
4. To modify a specific check, select the Edit icon next to the check's net pay, then click OK. 

Additionally, you'll want to check this article and learn how to customize the reports to see the specific details: Run payroll reports.

I'll ensure your needs are taken care of if you have further questions about modifying your payroll. Have a great day ahead.