Hi, @chefsplace.

Thanks for reaching out to the Community. I'll be sharing some details for your clarification.

The option of changing units into hours in your invoice is unavailable. If you want QuickBooks Online to count the invoice hourly instead of per unit, you can manually convert the units into an hourly count and enter it in the Quantity section. Once the conversion is complete, you can modify your invoice template accordingly. This will help you ensure accurate billing and better manage your invoicing process.

To change the invoice template, follow these steps:

1. On the left navigation panel, click +New.
2. Under the Customers section, choose Invoice.
3. Fill out all information and click the Gear icon at the upper right corner.
4. At the bottom part, click Change what your customers see.
5. From there, click on the Content tab.
6. Click the second section on the preview invoice.
7. Click Edit Labels and Widths, then edit Quantity into hours.

If you want to change the counting from per unit to hourly in your invoice, you may do so by using a third-party app. Let me guide you on how to add a third-party app:

1. Go to Apps on the left navigation panel.
2. Click on Find Apps.
3. From there, on the search bar you can enter keywords for the apps that will suit your needs.

You might also want to check out this article for future reference about the updated estimates and invoices in QuickBooks Online: See what's new with estimates and invoices in QuickBooks Online.

Feel free to reply or post if you need further assistance about invoices or any QuickBooks-related concerns. I'll be happy to help.