Circular No. 737-Income Tax Sections 44AD and 44AE were inserted in the Income-tax Act, 1961, by the Finance Act, 1994, w.e.f. 1st April, 1994. Section 44AD provides for a method of estimating income from the business of civil construction or supply of labour for civil construction work, where the gross receipts from the business do not exceed Rs. 40 lakhs.