Updated return time-limit extended to encourage voluntary compliance, with higher additional tax rates for later filings.

Extension of the filing window for updated returns from two years to four years with a graded schedule of higher additional income-tax rates for filings after two, three, and up to four years; filing barred where a show-cause notice has been issued after thirty-six months, subject to an exception if a later determination finds the notice unwarranted. Effective 1 April 2025.

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