In order to change your branch, you need to be a 3rd-semester student without any backlogs in the previous 2 semesters. If you satisfy these criteria then go through the following steps:

• Consider talking to your faculty advisor (proctor) in your present department and highlight the reasons for your change of branch.
• Take his/her permission and signature on your application addressed to your Head of Department (HoD).
• If you do not have a faculty advisor (proctor) then, directly talk to your HOD highlighting your interest in the new branch you aspire to change and then take his/her permission and signature on your application.
• If the HoD agrees, then he/she will forward your letter to the Principal. 
• Once you get it approved by the principal, you need to go to your college's administrative office.
• Pay the VTU fees (INR 2500) and required semester college fees (depends on your college). 

After this, you will have successfully completed the procedure.