MUMBAI: After targeting individuals who made large cash deposits in banks during or after demonetisation, the income-tax department is now going after businesses that deposited lots of cash in corporate accounts in the second round of demonetisation tax notices.Since Monday last week, the department has been sending notices to entrepreneurs, including some prominent jewellers, diamond traders, textile merchants and real estate developers, who have deposited money in their corporate bank accounts, a Mumbai-based income-tax official said.This round of tax notices is focused on "big fish", the official said. "Anyone who may have deposited unexplained cash in bank accounts after demonetisation has received notices. The tax notices were sent through emails of the taxpayers," the person said. People in the know said the number of tax notices sent since last week could be in lakhs.At the time of deposits, most companies had claimed it was cash on hand from their business activities. The main source cited was from sale proceeds. Along with the notices, the tax department has sent bank statements of such transactions and asked these businesses to disclose details of the source of income through a questionnaire consisting four questions."Tax department is seeking the information of the customers to whom the cash sales are made," said senior chartered accountant Dilip Lakhani. "Assessees are asked to give the bifurcation of the customers as to whether they are identified or unidentified and as to whether they hold PAN number or not. The tax department may cross verify the genuineness of the transaction where the customers are identified and having PAN number," he said.The first set of demonetisation tax notices was sent to individuals around January this year. ET was the first to report on January 28 that about 5,000 tax notices were sent to those who had deposited Rs 1 crore or more in their bank accounts. While the second wave of tax notices has begun, the tax department is continuing with those who were sent notices in January.