Error while filling ITR1

In Bank account tab, the data is prefilled, but not completely.

Check the details of each account. In some of them, the bank IFCS code would be filled but not the bank name. So complete that.

I deleted the accounts and reentered still the same error is coming. All accounts are validated and still there is error. 

Well its a cookies problem. The cookies retained under the page do not allow you to proceed with correct data.

Here there few tricks that work. 1. Delete cookies, for that you need a software engineer, or may Helpline can do something.

Or wait for new release of software, which happens every now & then, so with new release, the old cookies get automatically deleted.

What my staff does is remove the file totally, by importing it offline, and after rectification of data, validate, it works well.