The cap for filing return using ITR 1 is Rs. 50 lacs. It is mentioned as Total Income.
Whether it refers to Gross income or taxable income - after allowing exemptions under Section 10. For example, one's gross receipts are Rs. 54 lacs and after removing - say Rs. 20 lacs received as Gratuity as per Act, the taxable income would be Rs. 34 lacs only. In such case, whether he has to use ITR 1 or ITR 2. Pl clarify