The IDFC Infrastructure Bonds issue joins five other issues this financial year. A similar issue by Rural Electrification Corporation is already open. By investing in these products, taxpayers can claim a deduction of up to Rs 20,000 under Section 80CCF. This is above the Rs 1 lakh invested under Section 80C. While you save tax, your real returns may not be as high or precise as those being projected by some brokers. So before you rush to invest in the issue, here are a few points to ponder.