Option under section 115BAC: Form 10-IE governs exercise or single subsequent withdrawal and requires prescribed taxpayer details. Form 10-IE permits an individual or Karta of an HUF to exercise or withdraw the option under clause (i) of sub-section (5) of section 115BAC by furnishing identification, PAN, business status, IFSC Unit disclosures, and prior exercise details. The form requires an affirmation that statutory conditions of section 115BAC are satisfied when exercising the option and records the constraint that an option once exercised cannot be withdrawn for the same year and may be withdrawn only once subsequently, rendering the taxpayer ineligible to opt thereafter.