Revised Return can be filed even after intimation u/s 143(1) is issued since the same is not considered as an assessment order in the court law though referred to as summary assessment. Since even after the issuance of intimation u/s 143(1), regular/scrutiny assessment can be done without any restriction. There is a case law of Gujarat High court in which the court held that the assessee can file revised return even after intimation is served . S. R. Koshti v. Commissioner of Income-tax [2005] 276 ITR 165 (Guj). The issue is settled to rest by the decision of Supreme Court in the case of ACIT vs Rajesh Javeri Stock Brokers (P) Ltd. 291 ITR 500 in which it was held that intimation although deem to the notice of demand U/s. 156 can not taken as assessment order. Revised return can be filed after intimation u/s 143(1)(a)-AO must amend such intimation on the basis of revised return-Gujarat HC [2011] 333 ITR 0508 Commissioner of Income-tax Versus Himgiri Foods Limited