Original Return – s. 139(1)
Belated Return – s. 139(4)
Revised Return – s. 139(5)
Updated Return (ITR‑U) – s. 139(8A)
Return in response to notice – s. 142(1)
Return for reassessment – s. 148
Search-related returns – s. 153A
Defective Return (concept) – s. 139(9)