Hi there, h_al583799. I see you're concerned about your account's negative balance in QuickBooks Online (QBO). Let me provide additional information about the negative balance.
To assist you better, kindly specify the account with a negative balance and provide a screenshot of the relevant section. Any additional details would be greatly appreciated.
In QBO, there are two sections that'll show negative balance in your account:
Bank feeds
Chart of accounts
If you're referring to your bank feed, QuickBooks displays two balances for your account: the bank balance and the QuickBooks balance. The negative amount is calculated based on the transactions you have entered into QuickBooks, including any that have not yet cleared your bank.
To match these two balances, you can pull up your bank statement and verify all the transactions from your statement to your QBO account. If there are missing transactions, you can add those, and if there are incorrect amounts, you can also change them to the correct account.
Once you're all set, you can proceed with reconciling your account by clicking the Gear icon and selecting Reconcile.
I've added a screenshot for your visual reference.
However, if you're referring to something else, feel free to reply to this post so we can assist you as best we can.
In addition, refer to this article to learn how to match and categorize your bank transactions for you to manage your books accurately in QBO: