Gstr 1

I am an assesse who file quarterly gstr1. In gstr 1 , where we fill the details of invoice there is an option of -
Is the supply eligible to be taxed at a differential percentage of the existing rate of tax , as notified by the government?
If yes, the applicable percentage of tax rate is 65
Sir plz guide me on this point , what this means & how this is to be treated.