Supplier quotation

Hello,

In this link, the supplier can update their values as per the quotation. I created it according to the given link, however, I am not able to write anything.
https://docs.erpnext.com/docs/v13/user/manual/en/buying/request-for-quotation

It is showing nothing like this.

So anyone can please say which permissions I have to give?

Thanks in advance