S. 44BB : Mineral oils-Computation-Presumptive tax-Revenue received on account of provision of facilities and services of seismic data acquisition, planning and carrying out of pre-survey study, taking marine data and confirming prospects, maintenance/upgradation/support of software licences-Not fees for technical services-Reimbursement of service tax-Not includible in gross turnover for computing taxable income. [S. 9(1)(vii), 44DA]