Hello, JMB007.

I can feel the challenge you facing to make your bills billable. I'll help you in achieving your goals.

Before we proceed, please ensure that QuickBooks Desktop is updated to the most recent release so you have access to the newest features and fixes. Next, check your Company Preference to see if the Mark all expenses as billable checkbox is selected.

Here's how:

1. Proceed to the Edit menu and choose Preferences.
2. Select Time & Expenses on the left-side panel.
3. Click the Company Preferences folder.
4. Make sure to Mark all expenses as billable box is ticked.
5. Once done, choose OK.

Once you create a bill, you'll have to make sure you've selected a customer under the Customer: Job column.

Let's run the Verify and Rebuild data if you're still unable to mark the bill as billable. Since you possibly encountered a data problem causing the option to disappear. Please refer to this link for a complete guide: Verify and Rebuild Data in QuickBooks Desktop.

I'm also adding this resource for future reference to settle your payables: Pay bills in QuickBooks Desktop.

Don't hesitate to post your reply if you need further assistance with billable expenses. I'll keep an eye on your response. Have a great day.