Capital gains account closure

Hi 

I had opened a capital gains account in July 2017 for the capital gains for a property sold in October 2016.

Now in July 2018 I have purchased another property whose sale value is substantially more than the capital gains.

I paid the entire consideration without withdrawing the money from the capital gains account.

The banks has asked me to get a NOC from my assessing officer to close the account in Form G.

What documents are required for this?

Regards

Ravinder