How Fixed the Deleted Transaction?

Thanks for posting here, usermoazzam.

Let me help you with the deleted transactions.

We're unable to undo once a transaction has been deleted. However, there's a way to get the info so we can recreate it. Here's how:

1. Go to the Gear icon and select the Audit log.
2. Filter it to see the desired data. 
3. From the HISTORY column, click View.

Once you gather the details, you can now record it again. Click the +New button and select the transaction type.

Also, here's how to use the audit log in QuickBooks Online. Need more references and articles in managing your business? Please visit the Help Articles page.

Keep on posting here if you need more help. Take care!