I am sharing information of the Air India e ticket refund

You can submit a ticket for refund to the air port which is either partially utilized or totally unutilized, within one year after expiry of the validity of the ticket.

The refund would however be processed subject to the fare restrictions of the ticket

If the payment has been done in cash, a cheque with the refund amount is sent to the address as specified by them

If you need more information of it ro any other thing then asked me
Best of luck