Non-salaried assessees/ Assessees who have business income will be required to file Form 10-IE only once in their lifetime to opt for a new tax regime u/s 115BAC. If you have filed in one financial year you need not file Form 10-IE again. Note: If you want to opt-in for the new tax regime for the first time you have to file Form 10-IE. OR if you want to opt-out of the new tax regime now, you have to file Form 10-IE.