It's my pleasure to help you today, Alnoor55.
To correct the downloaded transactions signs that had flipped, you can batch delete your imported transactions listed under the For Review tab.
Here's how to exclude:
- Go to the Banking menu and choose the For Review tab.
- Select the transactions you want to exclude.
- Click the Batch Actions drop-down arrow and select Exclude Selected.

This will move the transactions to the Excluded tab from the For Review tab.
You may find this article handy to learn more about the process of excluding downloaded transactions in QBO.
Once done, you can re-import your transactions anytime you desire. You can read through this article for step-by-step instructions: Manually upload transactions into QuickBooks Online.
Check out this article about categorizing and matching downloaded transactions from your bank: Categorize and match online bank transactions in QuickBooks Online.
In addition to that, you visit these links about reconciliation in QBO:
The Community is always open if you have other questions. I'll be around to help. Wishing you a great day ahead!