Hello there, mickey. I'm here to share some insights about how running a balance sheet report by class works in QuickBooks Online (QBO).

In QBO, the unspecified or Not Specified transactions that are showing in your balance sheet are your Accounts Receivable, Accounts Payable, or Payroll transactions like Receive Payment and Pay Bills because these transactions can't be split into different classes. 

Also, please ensure to assign classes to your transactions so they won't appear as Not Specified in your Balance Sheet report.

Lastly, make sure to select the correct Report period, Accounting method, and other filter customization within the report to show the correct classification.

You can check out this article for more details about this process: Run a balance sheet by class or location in QuickBooks Online.

Additionally, visit this article to learn more about how to focus on the details that matter most when you pull up reports in QBO: Customize reports in QuickBooks Online.

Keep me posted if you still have questions or concerns about managing your financial reports in QBO. I'll be here to lend a helping hand. Have a great day ahead!