Is there any way to change the class on paychecks that have already been processed? New employee was automatically assigned to a new class, her name, instead of dept.

Hi, tanja.

Updating employee classes in QuickBooks is made easier for you. To do that, you will need to access the Payroll Settings to make the necessary changes that you want. Here's how:

1. From the Gear icon at the top, choose Payroll Settings.
2. This will open the Preferences page.
3. From there, navigate to the Company and Account section and then click on Accounting.
4. Scroll down to the bottom and go to Classes.
5. Choose the option saying, I use different classes for different employees.
6. Click OK to proceed to the next page.
7. Scroll up and you will see the boxes where you can choose a different class for each employee.
8. Once updated, click I use different classes for different employees to save the settings.

If the paycheck is already processed:

1. Go to the Gear icon and choose Payroll Settings.
2. Scroll down and click the Pencil icon for accounting.
3. Click the Pencil icon for the Class track.
4. Choose how you want to track classes for your payroll and click Continue.
5. Click the Pencil icon for Want to update existing transactions.
6. Start date and click Update. Be sure it covers the dates of the paychecks that you want to retroactively add classes for.
7. Click Continue and then Done.

You can check your report again after assigning classes to your payroll transactions. 

For more information about the Class feature, check out the article called Get started with class tracking in QuickBooks Online to learn more. 

For future reference, you can read through this article for more insights about managing your payroll: Set up Payroll account preferences.

You can always go back to this thread if you need further assistance. I'll be happy to help you again!