Can we file ITR from regional office?

You can file manual return only at the place were your registered office is located, however an e return can be filed from anywhere, means the ward and range do not changes. the ward and range of an assessee is alloted depending upon the location. in case of corporate assessee, the registered office is taken into account. so in your case you have to file ITR to kerala jurisdiction. if u want to file it from other location then first change yr reg. ogfice by passing a board resolution, file it to ROC with proper fees. transfer yr IT file to ITO of banglore jurisdiction then it is possible to file ITR in banglore.

have a nice day :)

Thank you Amitesh!