QuickBooks Online has been updated with a new interface, leading to significant changes in the navigation bar, including the removal of the Accounting tab, @Dlong2.
However, if you need to access the Chart of Accounts or Reconciliation window, navigate to the Transactions tab or use the Gear icon.

Also, the left menu can be customized. You can add features you want to be accessible. Follow the steps below:
- From the left menu, click the Pencil icon beside Menu.
- Under Menu, you can uncheck the features you don't need.
- From the Bookmarks, you can check the features you want to add.
- Hit Save.
Here is an article you can check to help you navigate with QuickBooks Online: Understand the navigation menu in QuickBooks Online.
To learn more about the Chart of Accounts, check out this article: Learn about the Chart of Accounts in QuickBooks. It provides a detailed breakdown of account types and their definitions.
Feel free to comment below if you have questions about managing your accounting transactions in QuickBooks. I'm always here to help. Wishing you and your business continued success.