Hi there, Johnf0614.
I'll share some information on how to fix a negative balance on your Accounts Payable.
The Account Payable is showing negative due to some invalid entries. To fix the balance, I recommend pulling up the report and looking for any inaccurate entries.
To do this, just go to your Chart of Accounts, and click the down arrow the beside View Register option. Then, click the payment that has an unusual amount.
I've added a screenshot for your reference.
For future reference, read this article about keeping your accounts organized: Merge duplicate accounts, customers, and vendors in QuickBooks Online.
Please let me know if you still need help checking your A/P. I'm always here to help.