I have done my B.Tech for further studies, in which field I can go? I am confused, please guide me.

It depends on what stream you did B.Tech with. You can pursue many related fields for Masters. You can also do MBA in your desired field for a quick placement.

Education is not limited, it is vast, so you can opt for M.Tech in the specializations in the field in which you want to pursue, and you have interest in it, so you can carry forward it. Be more precise in which field you have interest, so that I can help you more better.