I had taken computer by mistake in 12th class, now can neet

If you want to go for the NEET examination, then you need to have Physics, Chemistry & Biology in your 10+2 with a minimum of 50% marks in aggregate of this subjects (for UR candidates) & 45% marks for SC & ST candidates.

So if you don't have this subject you can't go for the NEET.

If you wish you can give the on demand examination of NIOS (for the subject which is not in your curriculum), this way you can be eligible as NIOS score is accepted by NEET till now.

For more information regarding NEET consider the link below:

https://medicine.careers360.com/exams/neet

I hope this helps. Goodnight!