Delay in filling online exam appliation for final

Dear Freinds,

I am in south africa, i will be returning to India on 18t of september.

I have already submitted te exam appliation form through online, but the PDF file generated is to be attested by the CA.

But I would like to know, till what time we can submit the hard copies attested by a CA, to the institute through delay payment.

Thanks a lot in advance