Hers’s an interesting article from ET which highlights the 10 common mistakes that can fetch you a tax notice. They are as follows:

  1. Not reporting interest income.
  2. Ignoring income of old job.
  3. Not filing tax returns.
  4. Tax sops on house sold before 5 years.
  5. Misusing forms 15G, 15H to avoid TDS.
  6. Not deducting TDS when buying property.
  7. Not reporting foreign assets.
  8. Disregarding clubbing provisions.
  9. Not reporting tax-free income.
  10. Spending, investing beyond means.

Follow this link to read the full article:
10 Common Mistakes That Can Fetch You A Tax Notice