Section 29

Notwithstanding any provisions of Chapter Two of this Act, where
taxation for all practical purposes, the income of a person chargeable to tax under this
Act cannot be ascertained or records are not kept in such a manner as to
enable proper assessment of income, then such person shall be assessed on
such terms and conditions as may be prescribed by the Minister on the advice
of the Joint Revenue Board in a regulation under a presumptive tax regime.
Nigeria Tax Act, 2025 2025 No. 7 A 415