Hi there, @sumitava.
Connecting your bank account is my top priority. That way, you can manage and track your bank transactions in QuickBooks Online (QBO) quickly.
There are some possible reasons why you're unable to connect to the SBI bank account in QBO.
Let's log in to your bank's website, then review the notifications if they have maintenance and the types of accounts.
Once confirmed and the issue keeps going, I'd recommend doing fundamental troubleshooting steps to isolate the problem. Stored cache files on your browser can sometimes cause this to happen.
We can begin by accessing your account in incognito. These browsers won't save any browsing histories. Feel free to use these shortcut keys:
Once logged in, connect the bank again to verify it's already performing adequately. Please ensure to choose the exact bank URL because some banks have multiple names on our list. For more details, check out this article: Find your bank or credit card account when you connect to online banking.
For more information, check out this article: Manually upload transactions.
Additionally, can you please let me know if you receive any errors while connecting your bank account? This way, I can double-check our reports if we have an open case about connecting accounts.
I've also added some articles about handling bank transactions, fixing some errors., and other topics.
I'll be waiting for your response. I want to ensure your bank account is connected for you to save time. Take care always.