S. 154 : Rectification of mistake-Deduction at source-Interest other than interest on securities–Merger-Order of Commissioner (Appeals) stood merged with order of Tribunal, and further with subsequent orders of High Court and Supreme Court; hence, there did not remain or survive any jurisdiction with Commissioner to seek any rectification or correction in his earlier order–Rectification order was quashed. [S.194A, 201(1), 201(IA), 250]