Income tax department has started sending notices to non-filers for the assessment year 2013-14 & onwards & are also using the said information to verify under-reporting of income
1. Annual Information Return(AIR)
AIR-001: Cash deposits aggregating to Rs. 10,00,000/- or more in a year in any savings account
AIR-002: Paid Rs. 2,00,000/- or more against credit card bills
AIR-003: Investment of Rs. 2,00,000 or more in Mutual Fund
AIR-004: Investment of Rs. 5,00,000/- or more in Bonds or Debenture
AIR-005: Investment of Rs. 1,00,000/- or more for acquiring shares
AIR-006: Purchase of Immovable Property valued at Rs. 30,00,000/- or more.
AIR-007: Investment in RBI Bond of Rs. 5,00,000/- or more

2. Central Information Branch (CIB)
CIB- 94: Sale of Motor Vehicle
CIB-151: Transfer of immovable property
CIB-154: Transfer of capital assets where value declared for the purpose of stamp duty is more than sale value
CIB-157: Purchase of Immovable property valued at Rs. 5 lakhs or more
CIB-183: Time deposit of Rs 1,00,000/-
CIB-185: Purchase of Bank Draft of more than Rs. 50,000/- in cash
CIB 321: Share Transactions more than Rs. 20,000/-
CIB-403: Investment in Fixed Deposit/Time Deposit exceeding Rs. 2,00,000/-
CIB-406: Payment made against Credit Card more than Rs 2,00,000/-
CIB-410: Cash deposit aggregating of Rs 200000 on a day
CIB-502: Contract of Rs. 10,00,000/-or more in the Commodities Exchange
CIB-514: Interest paid by co operative credit Society
CIB: Payment in connection with foreign travel amount exceeding Rs. 1,00,000/- at one time
CIB: Payment to Hotel and Restaurants exceeding Rs. 1,00,000/- at one time

3. TDS return
TDS-94A: TDS Return – Interest other than interest on security (section 194A)
TDS-92B: TDS Return – Salary to Employees (section 192)

4. Service Tax ReturnEXC-002: Turnover from services reported in Service Tax Return