You've come to the right place, @johnelliottmorto.
I can help walk you through adding an expense item in QuickBooks Online (QBO) chart of accounts.
If you're referring to an expense account, here's how:
1. Go to the Gear icon, then pick Chart of Accounts under Your Company.2. Click New at the upper right.
3. Choose Expense on the Account Type drop-down, then pick a Detail Type.4. Enter a Name, then Save and Close.
There you have it. For additional information, check out this article: How to create a new parent account or subaccount.
Please let me know if you're referring to something else in the comment. I'm always here to help. Have a great rest of the day.