2. In the navigation bar, click on the "Cases" tab.

3. Click on the case for which you want to save a time/expense entry and then create an invoice.

4. Go to the Time/Expense sub-tab and click on the "+ New Time Entry" or "+ New Expense Entry" button to add the entry.

5. Add the Time or Expense entry details.

6. Then go to the "Billing" tab. Under the "Bill" sub-tab, click on "+ Quick Bill" to create an invoice.

7. Click on the "+ Select Time/Expense Entry" button.

8. Select the Time or Expense Entry you want to include.

9. Click on "Save" to generate the invoice.