How to enter a negative amount in timesheets section

It's great to see you in the Community space, @toni11.

When creating timesheet in QuickBooks Desktop, you can enter the job, service/payroll item, and the duration. However, the amount isn't included since you're only tracking total hours of work. You can check this article for more information: Create and print timesheets.

Once you've tracked the hours, you can use this data when it's time to create a paycheck: Create paychecks based on timesheet hours.

These resources should get you going in the right direction. If you have follow-up questions or need anything else, do let me know. I'm always here and ready to help.

Unfortunately QB doesn't allow negative time on time records.  It does in Payroll, but not in the time feature.

@IntuitLily 

RE: However, the amount isn't included since you're only tracking total hours of work.

The OP knows that.  That's why they asked, "How to enter a negative amount in timesheets".  They're entering positive amounts (time) already, and want to know how to enter negative time.