Deductions for IFSC and Offshore Banking incomes: extended tax deduction options for qualifying SEZ-based units. Section 80LA allows deductions for incomes of Offshore Banking Units and IFSC Units in Special Economic Zones: staged full and reduced deductions for OBUs and an option for IFSC Units to claim a one hundred per cent deduction for ten consecutive assessment years out of fifteen, subject to furnishing an accountant's certification and a copy of the requisite permission or registration; eligible incomes include OBU business, specified banking activity with SEZ undertakings, approved IFSC business, and certain transfers of leased aircraft or ships by qualifying IFSC units.