Hello there, @EricaEstrada.

I'll help you fix the error message you're getting when creating a billable expense.

Before creating a billable expense, you can set the settings to a single account to avoid this error.

Here's how:

1. Go to the Gear icon.
2. Choose Expenses.
3. Click the pencil icon for Bills and expenses.
4. Tick the checkbox for Track billable expenses and items as income.
5. Choose the In a single account button.
6. Select Save.
7. Hit Done.

You should be able to create a billable expense now without error. You can refer to this article in creating a billable expense: Enter billable expenses.

If the issue persists, switch to Business View instead of Accountant View from the Gear icon.

I'm also adding this article to guide you in running reports in QuickBooks Online: Run reports in QuickBooks Online.

Let me know if you have questions about creating a billable expense. I'm always here to help. Have a great day.