For years, a mismatched PAN or a wrongly entered challan number in a TDS return wasn’t something deductors lost sleep over. There was always time to go back and fix it, sometimes years later. That comfort disappeared on 1st April 2026. Under the Income Tax Act, 2025, correction statements for TDS and TCS returns can now only be filed within two years from the end of the tax year in which the original statement was due. What used to be a six-year window has shrunk considerably, and understanding exactly how this works matters for anyone still holding onto old, uncorrected filings.

Why the Window Got Shorter

The earlier system let deductors revise a TDS return almost indefinitely, and in practice, corrections often came in two, three, or even five years after the original filing. This created its own set of problems, unresolved mismatches lingering for years, deductees stuck without proper credit, and a backlog that made audits harder to conduct cleanly. Section 397(3)(f) of the new Act addresses this by setting a firm two-year cutoff, counted from the end of the tax year in which the original statement was due.

The change isn’t just a policy preference sitting in guidance notes, it’s now written directly into law, replacing the earlier six-year practice that existed under the 1961 Act.

How This Affects Older Returns

The transition carries a real deadline that deductors needed to act on before 31st March 2026. Correction statements for the following periods were only accepted up to that date:

• Q4 of FY 2018-19
• All quarters of FY 2019-20 through FY 2022-23
• Q1 to Q3 of FY 2023-24

From 1st April 2026 onwards, none of these can be corrected anymore. They’re considered time-barred, and TRACES simply won’t process a correction request for them, no matter how small or genuine the error.

The rule moves forward on a rolling basis. During the period from April 2026 to March 2027, corrections are allowed only from Q4 of FY 2023-24 onwards. Once April 2027 arrives, the earliest year eligible for correction shifts again, to Q4 of FY 2024-25. Each passing year quietly closes the door on one more year’s worth of filings.

What Happens If a Correction Is Missed

Letting the two-year window lapse isn’t a minor inconvenience. A few consequences follow directly:

• Deductees may be stuck with unresolved mismatches, which can delay or block their tax credit
• Penalties ranging from Rs 10,000 to Rs 1,00,000 can apply, depending on how serious the underlying default is
• Uncorrected statements increase exposure during tax audits, since there’s no longer a route to fix them later

None of this is retroactively fixable once the window closes, which is precisely the point of the change. The earlier flexibility is gone, and accuracy now needs to happen closer to the time of filing rather than being patched up years down the line.

Conclusion

Instead of depending on an uncontrolled safety net, the two-year correction window encourages TDS compliance to do things right the first time. Deductors who are waiting on old, unfixed mistakes from previous years have already missed the opportunity to correct a number of them, and the ones that are still fixable will close on a fixed annual cycle. The only practical method to stay ahead of this transition is to include a routine reconciliation and check PANs, challans and deductee details long before the two-year deadline.