Deduction for book publication profits allowed for certain assessment years, subject to exclusions and interactions with other deductions. A new section 80QQ permits a deduction in computing total income for profits and gains from printing and publication of books carried on in India for the assessment year commencing 1 April 1971 and the four subsequent assessment years; the deduction equals twenty percent of such profits. Where the same profits qualify for deductions under sections 80H, 80J or 80P, section 80QQ applies to the profits after those deductions. 'Books' exclude newspapers, journals, magazines, diaries, brochures, tracts, pamphlets and similar publications.