Hi there, jblai011.
Thanks for bringing your question forward here in the Community. I'd be glad to point you in the right direction about employee hours in QuickBooks Online.
As you may have already found, there isn't currently a way to enter negative hours for your employees within QuickBooks Online Payroll. However, I do see how having that ability could be useful and I recommend sending a message to the Product Development Team. This can be done directly through your account. Here's how:
1. Click the Gear icon in the top right corner.
2. Select Feedback.
3. Enter your suggestion in the panel that appears and then send the message.
You can check the Firm of the Future site for these types of product updates and feature releases. If you have any other questions or concerns in the mean time please don't hesitate to reach back out.
