sir i have scored 62% in my hsc board in science stream and i applied for bsc.it but now i want to go in arts so what is the procedure now
You just have to leave your current college and get the admission cancelled. You wont get a fee refund but they will cancel your admission and return your documents.
Then you can go to any other college of your choice for BA and then get admission there. It is a fairly easy procedure, you wont face any problem in this.
All the Best!