​ITR stands for Income Tax Return​. It is a prescribed form through which the particulars of income earned by a person in a financial year and taxes paid on such income are communicated to the Income-tax Department. It also allows carry -forward of loss and claim refund from income tax department.​Different forms of returns of income are prescribed for filing of returns for different Status and Nature of income. These forms can be downloaded from https://www.incometax.gov.in/iec/foportal