Answer

1. F

   Facts

   For many penalties, Sec 273B says no penalty if you prove reasonable cause for the failure. For Sec 270A, the defence is mainly through its own exclusions, such as a bona fide explanation with full disclosure. Reliance on a professional can support either argument if it is genuine.

2. P

   Provisions and law

   • Sec 273B, Income-tax Act 1961No penalty for certain failures if reasonable cause is shown
   • Sec 270A (now Sec 439)Penalty of 50% of tax on under-reported income, or 200% where under-reporting is due to misreporting
3. A

   Analysis

   Give facts, not just a statement. For example, show that you gave all documents to the accountant, that the error was a wrong schedule entry, and that you paid tax once it was found. An affidavit from the accountant can help. Reasonable cause works better for technical failures, like a late audit report, than for income that was hidden.

4. C

   Conclusion

   1. 1Write down the timeline of what happened
   2. 2Collect proof that full information was given
   3. 3Get a letter or affidavit from the professional if relevant
   4. 4Present it in the reply with supporting documents

The 2025 Act number for Sec 273B is not confirmed in our mapping; cite the 1961 section for past years.

General guidance from TaxSavvy’s library of money processes. Laws change; your Savvy confirms the answer on your exact case before anything is filed.