If I change class codes from last name only to include first name will the data all convert for the prior periods?

Hi teresae!

It's great to know how you use the Class feature in QBO. I'm happy to answer your question about changing the names of your classes.

The class codes in your historical transactions will also update if you edit their names. You can try this on the QuickBooks Online test drive if you want to see the effect before doing it on your QBO company.

Here are some articles for your additional reference:

• Turn on class tracking in QuickBooks Online - use class in payroll
• Track your transactions by class - use class on downloaded transactions
• Get started with class tracking in QuickBooks Online - everything about classes

Let me know if you have other questions about the Class tracking feature in QBO. Stay safe and have a good one!