@SK-Solution 

As far as I know, there is no need to register the warranty portal if you are from India, you can just contact the local tech support to confirm the warranty if your TP-Link device is faulty. It is suggested to keep the purchase invoice/receipt in case they need to confirm that:
https://www.tp-link.com/support/replacement-warranty/

BTW, is there anywhere that you noticed informing you to register for the warranty? We may confirm that if you can show us more info, thanks.