S. 237 : Refund -Order of refund attaining finality- Department cannot adjust admitted refund against future dues yet to be adjudicated —Entitle to refund- Department Withholding refund of Assessment Year 2014-15 — Provisions not attracted to refund of assessment Year 2014-15 or any Assessment year prior to Assessment Year 2017-18. [ S.143(1) 144C ,154, 241A , 245 Art , 226 ]