Adding items in your chart of accounts is easy with QuickBooks Online. Let me show you how.
Here's an article that you can read on for more details: Create, edit or delete an account in QuickBooks.
Also, if you want to organize your chart of accounts you may check this article: How to change the sort order of chart of accounts
Please reply to this thread if you need further assistance. We'll be here to assist you. Have a good one.