Under section 44AD, if your declared income falls below 8% of gross receipts, you have to undergo tax audit even though your turnover is below 1 crore. However proviso 5 to Sec. 44AD states that if any financial year, the assessee has to taxable income (of if his income is below the taxable minimum) then he need not be subjected to tax audit and the return could be uploaded with out Tax Audit Report.