Detailed answer
No late fee applies if your total income is below the basic exemption limit.
Refunds can still be claimed in a belated return.
After 31 December 2026 the normal route closes; an updated return (ITR-U) can be filed later with additional tax, but it cannot be used to claim a refund or increase a loss.
Indus Tax files belated returns and computes the fee and interest before filing.
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