(5)[ Notwithstanding anything contained in the foregoing provisions of this section, an assessee may claim lower profits and gains than the profits and gains specified in sub-section (1), if he keeps and maintains such books of account and other documents as required under sub-section (2) of section 44-AA and gets his accounts audited and furnishes a report of such audit as required under section 44-AB.] [ Inserted by Act 27 of 1999, Section 31 (w.r.e.f. 1.4.1998).]