The ITR-4 Form is applicable for individuals or HUFs who have income from proprietary business or are carrying on a profession.
If the requirements of audit are applicable, the due date of filing of return is 30th September. Otherwise, usually the due date of filing of return for non-audit cases is 31st July.
In case the presumptive method of taxation is applicable (Section 44AD and Section 44AE of the Income Tax Act), ITR-4S must be filed.
Since ITR-4S is applicable where gross receipts/turnover is less than Rs 1crore; assesses who are carrying out business or profession under presumptive income as per section 44AD & 44AE of the Income Tax Act but have turnover/gross receipts of more than Rs. 1 crore; will have to file ITR-4.