Welcome back to our forum, @Claudia11,

I appreciate you letting us know the outcome of the troubleshooting. I want to make sure this negative bill issue gets resolved.

Since the recommended steps did not resolve the negative amount, you can delete and recreate the bill. Before making the changes, I'd recommend creating a backup copy of the company file.

Let's pull up an Unpaid Bills Detail report to locate the negative amount. Here's how:

1. Click the Reports menu.
2. Choose Vendors & Payables.
3. Select Unpaid Bills Detail.
4. Update the report date.
5. Double click the bill with the negative balance.
6. Right-click on the transaction and click Delete Bill.

Once done, recreate the same bill and apply the payment. That should get you on the right track, @Claudia11.

Thanks for your time today. Please let me know how it goes. I'll be more than happy to help you if you need further assistance. Have a great day!