Thanks for sharing your first concern in the Community, @doug-heattreatto. 

The billable expenses is only available in the Plus and Advanced version of QuickBooks Online. If you have a different version, you'll want to upgrade your account to enjoy this feature.  

Then, follow these steps to turn on the billable expenses:

1. Go to the Settings menu, then select Account and settings.
2. Go to the Expenses tab, then select Edit or click the pencil icon from the Bills and expenses section.
3. Turn on the following:

• • Show Items table on expense and purchase forms
  • Track expenses and items by the customer.
  • Make expenses and items billable.

1. (Optional) Set up the following:

• • Markup rate
  • Billable expense tracking
  • Sales tax charge

1. Bill payment terms.
2. Select Save.

Once done, you can now proceed to enter billable expenses in QBO.

In case the option is still not there, I'd recommend clearing your browser's cache to fix issues when using QuickBooks Online.

Visit us and post again if you have additional questions. I'll be here to guide you more.