You don't need to enter a negative amount for your paycheck.
It isn't necessary to input negative amounts as QuickBooks recognizes them as deductions, but I have a solution for you. You can override the amounts in your paychecks.
Here's how you can edit the amounts:
You can also create a non-taxable reimbursement payroll item. First, you'll need to add a new payroll item. You may follow these steps:
Next, you need to set up the item. Here's how:
Once completed, you can now add the item to your employee's record. Here's how:
That's it! You can now successfully enter the reimbursement to your payroll. Please let me know if you have other questions.