Hi,

There may be lot of issues due to which a student maynot be able to continue his/her degree.  So, by explaining you current situation to your current institution in which you have completed your 1st semester, it is possible to leave the college legally and get your documents back upon request.

Inorder to leave an institution, you should get a No Objection Certificate and get it signed from the higher officials(principal or VC) of your current institute(college in which you have completed 1 sem of B.Tech) and submit it to the college(to which you are planning to join B.A) to which you will get admitted to.

As you have completed only one semester in B.Tech, most colleges will ask their students to pay the entire year's fee i.e, first year fee alone .  Get in touch with your institute to know more details about the fee.