Is Late Fee under Sec 234F applicable on Rectification Requests

No. Its technical error.

YOU CAN DO IT IN OFFLINE MODE  I ALSO TRIED BUT IT IS SHOWING INTEREST AND PENALTY, BUT IF YOUR LAST FILLING IS ALREADY  REVISED IT WILL NOT CALCULATE INTEREST AND PENALTY, MORE THIS IS OFFLINE Return Data Correction, NO NEW INCOME OR DEDUCTION YOU HAVE TO CHANGE.  YOU HAVE TO SUBMIT UNDER THE SAME SECTION IN THE LAST ITR SUBMITTED AS PER 143 1 WHAT I FEEL THEY WILL JUST CORRECT DATA THE REASON YOU WRITTEN IN COMMENTS, MORE THIS CORRECTION IS UNDER 154 YOU WILL SEE ON TOP WHEN CHOOSE YEAR AND SUBMIT, NATURALLY THEY WILL ISSUE NEW ORDER WHICH WILL BE BASED ON OLD ORDER.  IF THEY ADJUSTED ANY REFUNDS YOU CAN ADD IN PAGE IT OF RETURN, CHECK YOUR 26AS SECTION C  Details of Tax Paid (other than TDS or TCS)  IF YOU DON'T WANT TO TAKE A CHANCE WAIT TILL ONLINE RECTIFICATION START, WHERE YOU CAN CHANGE PART WISE 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.