Return Form ITR - 1 (SAHAJ) can be used by an individual whose total income includes:
(1) Income from salary/pension; or
(2) Income from one house property (excluding cases where loss is brought forward from previous years); or
(3) Income from other sources (excluding winnings from lottery and income from race horses, income taxable under section 115BBDA or Income of the nature referred to in section 115BBE).
Further, in a case where the income of another person like spouse, minor child, etc., is to be clubbed with the income of the taxpayer, this return form can be used only when such income falls in any of the above categories.
Source:- Income tax website.