Professionals and people running sole proprietorship businesses in India are required to file the ITR-3 form.
Hindu undivided families and individuals who make money from their professions or businesses must use the ITR-3 form.
An ITR-3 cannot be filed if the individual or the Hindu undivided family receives income from being a partner in a partnership firm that is conducting business; instead, an ITR-2 must be submitted in these circumstances.