Assessment of non-filers: officer may assess tax to best judgment; subsequent valid return withdraws order, interest and late fee remain.

Where a registered person fails to furnish the return after notice, the proper officer may assess tax liability to the best of his judgement using relevant material and issue an assessment order within the statutory assessment period measured from the date for filing the annual return for the relevant financial year. If a valid return is furnished within thirty days of service of that assessment order, the order is deemed withdrawn, but the liability to pay interest and late fee remains.

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