Revalidation of registration of ca final

Please can anyone guide about which date I should mention in date for revalidaion of rgistration to final?

I have sent application for revalidation of registration before more than one month but no any correspondance received for my registration status. So date on which i have submitted application should i have to mention or i have to wait for revalidation of registration letter?

As my Registration is going to expire on 15.02.2016 and if i fill form Before 15.02.2016 then it is considered as form filled up during valid Registration? As i have already sent revalidation application

Please Reply as soon as possible so i can fill my exam form.