What the updated return is, and the four-year window
If you have missed reporting Indian income or skipped a year, the law gives you a way to fix it yourself rather than wait to be caught. It is the updated return under Section 139(8A), filed on a form called ITR-U. It lets you file or refile for a past year and pay the tax you owe, and the window is generous: up to 48 months from the end of the relevant assessment year. That four-year window is recent, the Finance Act 2025 doubled it from the earlier 24 months, with effect from April 2025.
The cost of using it is an additional tax on top of the normal tax and interest, and it rises the longer you wait. Under Section 140B the extra is 25 per cent of the additional tax and interest if you file within 12 months of the assessment year ending, 50 per cent within 24 months, 60 per cent within 36, and 70 per cent within 48. So the earlier you regularise, the less the premium. Under the Income-tax Act, 2025 the updated-return machinery is re-housed, the return-of-income provision moves to Section 263, but for the year you are fixing under the old law the old Section 139(8A) still governs.
The limits, and the NRI use for it
The updated return is deliberately one-directional: it exists to let you pay more tax, not less. So there are firm limits. You cannot use an updated return to claim or increase a refund, to reduce the tax on your earlier return, or to declare or increase a loss. This is the point NRIs most often get wrong, if your Indian tax was over-withheld and you are owed money back, an updated return is not the way to recover it, because it can only add tax. You also cannot file one at all for a year that is already under a search, a survey, an assessment or a reassessment, and a further bar applies once a reassessment notice has been issued late in the window.
Where it is genuinely useful for an NRI is regularising income you simply missed, rent you did not report, a capital gain on a property or shares, interest on an NRO account, or a year you did not file when you should have. Filing an updated return and paying the tax voluntarily is far cheaper and safer than being picked up under a reassessment notice, which brings heavier consequences. The test is direction: if putting the year right means paying more tax, the updated return is the clean fix; if it means claiming money back, it is not available and you need a different route. A practising CA works out whether an updated return is the right tool, computes the additional tax, and files it correctly.