Types of Rectification in Income Tax E filing

When you find some thing to be changed or corrected subsequent to intimation from CPC and if you try to do rectification there are few options.

In that one reason- Correction in data.-Tax payer is correcting data in rectification..

Few times it will accept the rectified XML and some times it will not accept -reason -you must file revised return to correct the data.


Is it due to rectification deadline??

Except for the above reason , online rectification done beyond the deadline.Why??