you need to submit in the same section means your last verified return if 139 1 then chose section 139 1, if filed in 139 5 then 139 5
Return Data Correction (Offline)
Selection of appropriate reasons while submission of rectification request is mandatory for the correct processing of the request by the Department. Please re-enter all the entries in the schedules. All the corrected entries as well as the remaining entries mentioned in the ITR filed earlier are to be entered. Make the necessary corrections in the data. While doing corrections, make sure not to declare any new source of Income or declare additional deductions.
Rectification is available only for orders passed by CPC u/s 143(1) read with 154 till Assessment Year 2020-21 and not for other orders passed by Assessing Officers including Appellate Orders.
check-in excell part B-TTI sheet any interest and penalty added. if yes then don't submit.
wait for online correction mode, where you can make rectification sheet-wise.
Note any old ITR filed in paper mode is to be rectified in paper mode only by AO and they will never do.
my case pending since 2005-2006 after submitting documents challan copy of tax paid in the same year before July.
twice I visited the AO office in 2011 and 2013 and submitted documents.