I'm here to help you manage jobs in QuickBooks Online, @sarah175.

You'll need to turn off the Make expenses and items billable option in your settings if you don't want to bill companies/customers for a project you created in QBO. 

Here's how you can do it:

1. Click on the Settings ⚙ icon, then go to Account and settings.
2. Click on the Expenses tab.
3. Tick the Edit icon from the Bills and expenses section.
4. Turn off (ensure that it's not toggled) the Make expenses and items billable option.
5. Once done, select Save.

This is how it should look like:

For future use, go through these helpful modules about keeping track and handling transactions in QBO: 

• Run reports in QuickBooks Online
• Customize reports in QuickBooks Online

Don't hesitate to leave a reply in the comment section. I'd be delighted to assist you further with this matter. Take the best care!