I had linked by SBI Corporate account to quickbooks and it was working fine. Quickbooks changed it uninformed to State Bank of Patiala and now i am not able to connect.

Hello there, @cedricjoseph22!

We can update your online banking credentials so the system can establish a new connection to your bank. Let me show you how.

1. Go to Banking.
2. Under Bank and Credit Cards, select your SBI Corporate bank account.
3. Select Edit ✎.
4. Click Edit sign-in info.
5. Manually enter the user ID and password for your bank account.
6. Select Update.

Lastly, here's an article you can read for ideas about categorise your online bank transactions: Categorise and match online bank transactions in QuickBooks Online.

Keep me updated in the comments if you have any other questions. I'll be here to lend a hand.