If you've paid income tax via an online challan and need to correct it for a different assessment year, you'll need to contact your local Assessing Officer (AO). It's possible to correct challans from previous years, with one user successfully rectifying a challan from AY 2008-2009 last year.
30 May 2022
For rectifications in challans paid through online mode (internet challan) , taxpayer may contact their concerned Assessing Officer (AO) of the Income Tax .