Under Income Tax Act, all proprietors below the age of 60 years are required to file income tax return if total income exceeds Rs. 2.5 lakhs. In the case of proprietors over the age of 60 years but below 80 years, income tax filing is mandatory if total income exceeds Rs.3 lakhs. Proprietors over the age of 80 years and above are required to file income tax return if the total income exceeds Rs.5 lakhs. Get in touch with us to file the income tax return for your proprietorship firm today.