Total receipt of more than 15 lacs

As per clauses (a) & (b) of section 44 AB, If the gross receipts of a professional in a FY exceeds 15 lakh, Tax audit needs to be conducted, and after the audit is completed, returns has to be filed within September 30th.

If you are a professional then a gross receipt of more than 15 Lakh attracts Tax Audit. You need to consult a CA for this, he will audit your Income and Expenditure Account & Balance Sheet and give you an Audit Report and he may also assist you in filing the return. If you are talking about income of A.Y.2011-12. , you will have to pay a penalty of 100000.00 for delay in filing of Audit Report (Due date being 30th September 2011). Other details as provided by   R.S.KARTHIK are correct.