Welcome to QuickBooks Community, karthika.
I want to make sure first that I understand the concern correctly. Are you trying to import bank transactions? If so, you can use a CSV file format.
The columns that are required by QuickBooks Online are:
You'll want to remove unnecessary columns on the file so it won't cause a mapping issue. Please check these links for more details:
Please let me know if you need more help. Leave a comment and we'll respond as soon as we can.