Hello,
.
There's no problem in discontinuing,You can discontinue and prepare for neet.
.
But see that you will be prepared well and attempt the exam.
.
I think there will no fees for discontinuing the college,if you have paid whole year fees then they will just cut off the fees and return you half amount.
.
If you haven't paid then inform the College that you are discontinuing for MBBS listen to there instruction.
.
There will no much procedure to follow.
.
Thank you