For decades Indian tax compliance was defined by two codes that every conservative investor and retiree knew: Form 15G and Form 15H. These documents shielded people from Tax Deducted at Source (TDS) if their income was below the limit.

 

However as of April 1 2026 these forms have been retired. The Income Tax Act 2025 has introduced Form 121 as their replacement.

 

This change is not about new names; it's a big shift in how people file, process and monitor self-declarations for non-deduction of tax.

 

* The Genesis of Change: Why Consolidate?

 

In the past the Income Tax Act of 1961 had forms, 15G for people under 60 and 15H for senior citizens. This often caused problems. People submitted the form and banks struggled with manual checks and high error rates.

 

The Income Tax Act 2025 aims for "Unified Compliance." By merging these declarations into Form 121 the government has made it simpler. Now people fill out one form. The eligibility criteria are part of the data fields.

 

* Legal Framework: Understanding Section 206 (New Act)

 

The old forms operated under Section 197A of the 1961 Act. Form 121 is based on Section 206 of the Income Tax Act 2025.

 

Here are the key points:

 

- Eligibility: Any person (not a company or firm) whose estimated total income for the Tax Year is less than the basic exemption limit can file Form 121.

 

- Scope of Income: Form 121 covers payments like interest on securities, dividends and life insurance policy payments.

 

- The "Nil" Deduction Mandate: Once a valid Form 121 is submitted and a Unique Identification Number (UIN) is generated the deductor cannot withhold tax.

 

* The Anatomy of Form 121: What’s New?

 

Form 121 is designed for the age. It is linked to the Financial Diary (Form 168) which replaced the Form 26AS.

 

- A. The Unified Structure

 

The form no longer requires choosing a category. Instead it uses your Permanent Account Number (PAN) or Aadhaar to auto-populate your age category and exemption limit.

 

- B. The UIN Revolution

 

The significant change is the Mandatory UIN. Here's how it works:

 

1. The declarant submits Form 121 to the deductor.

 

2. The deductor uploads the declaration details to the TRACES 2.0 portal within 7 days.

 

3. The portal generates a 26-character UIN for that declaration.

 

4. This UIN must be quoted in all quarterly TDS returns to validate why tax was not deducted.

 

* Impact on Senior Citizens and Super-Senior Citizens

 

The benefits remain tiered. The 2025 Act keeps exemption thresholds for those aged 60 and above.

 

A significant improvement in Form 121 is the "Carry-Forward Validation." If a senior citizen has submitted a declaration for a fixed deposit spanning Tax Years the new portal allows for an "Annual Renewal" via a simple digital confirmation rather than requiring a new physical form.

 

* Responsibilities of the Deductor (Banks & Corporates)

 

The burden of compliance for deductors has shifted toward real-time reporting. Under the TRACES 2.0 framework:

 

- Verification: Deductors must verify the PAN status of the declarant. If the PAN is "Inoperative" or "Flagged" for non-filing Form 121 will be rejected.

 

- The 7-Day Rule: Failure to report a Form 121 and generate a UIN within 7 days can result in a fee.

 

- Digital Storage: Physical copies of Form 121 must be digitized and preserved for 6 years.

 

* Common Pitfalls and the Penalty Regime

 

The Income Tax Act 2025 has introduced Anti-Avoidance" measures.

 

- False Declarations

 

If a taxpayer files Form 121 despite having an income exceeding the exemption limit they face penalties. The penalty is not just the tax avoided but a flat 200% of the tax that would have been deductible.

 

- Aggregate Monitoring

 

Previously taxpayers would file 15G/H at banks often exceeding the limit in aggregate. Form 121 is integrated. The TRACES 2.0 portal provides deductors with a "Red Flag" if the declarant has already submitted Form 121s that exceed the threshold.

 

* Step-by-Step: Filing Form 121 in Tax Year 2026-27

 

Here's the professional workflow:

 

1. Assessment of Income: Calculate your estimated income for Tax Year 2026-27.

 

2. Digital Submission: Log into your banks portal or the Income Tax Departments "Citizen App."

 

3. Authentication: Use Aadhaar-based e-KYC to sign the declaration.

 

4. Acknowledgement: Ensure you receive the UIN from your deductor.

 

In conclusion the transition, from Forms 15G/H to Form 121 simplifies tax compliance. It provides the Tax Department with real-time data to prevent leakage.

 

As we start the Tax Year individuals and deductors must update their systems and understand the UIN workflow. The era of paper-trailing is over; the era of the Unified Declaration has begun.

 

Always ensure that your PAN is linked to your mobile number as Form 121 relies heavily on OTP-based validation.