Refund can be only claimed if the person has filed their Income Tax Return electronically. A manual Return does not entitle you to a refund.
The refund amount should be clearly reflected in your Income Tax Return in Iris.
Refund resulting from the Income Tax Return can be claimed by filing a separate application in Iris. To check the status of your application, please visit your relevant Regional Tax Office (RTO).
The refund can also be claimed later on after submitting your Income Tax Return, but within two years from the date of filling of return (date of assessment) or from the date on which the tax was paid, whichever is later.