We can't connect to Kotak Mahindra Bank right now. You can try adding an account from another bank. (155)

I can help you share some insights about the error 155, mrittika-eventst.

Banking error 155 in QuickBooks occurs when your financial institution is currently not allowing connections from our system.

In the meantime, you can bring in transactions into QuickBooks Online via WebConnect feature. You can check this article to manually import them into QBO: Manually upload transactions into QuickBooks Online.

I'm always here ready to help whenever you have additional banking concerns or any other QBO related issues.