Hi there, @Gallo-Solutions.

We're looking into the option of including subtotals of hours worked from timesheets on invoices. However, this option is currently unavailable. Subtotal will only calculate for the amount of the line items. You deserve a smooth and effortless experience, and I’m here to help make that happen.

I recommend sending feedback directly to our product engineers. By sending us feedback, you're helping us improve our services that you'll also get benefit from. Here's how:

1. While in the QuickBooks Online Home page, go to the Gear icon and select Feedback.
2. Fill in your suggestions in the Feedback field.
3. Select Next to send it.

Don't worry, we won't just stop there. I have a workaround that will help you achieve this function. By utilizing the Subtotal and the Message on Invoice feature, we can separate line items to make subtotals from them and describe them through the invoice message. Here's how:

1. Prepare your invoice line items along with the subtotals that separate the line items.
2. Calculate the hours subtotal and type them in an ordered list through the Message on Invoice textbox.
3. Click Save and Close if you're done.
   

After that, you can also learn how to customize your invoices and other sales forms in QuickBooks Online. This tool helps you create personalized and professional-looking invoices for your customers.

If you need help with customizing your sales form, click that reply button below. I'll always be here to assist you with anything.