I'm completed 12th I want to take civils coaching along with degree is this good for my career are not

The sooner you start your preparation for the civil services the better it is. However, I would suggest that remain focussed, strategize well and properly manage  your time so that you are able to complete your B.Tech also as well as clear the UPSC exam also .

Choose your optionals well. Go through the exam pattern, syllabus, assess your capabilities and see the question papers also.

Then talk to people about the best coaching if you wish to take it. But firstly, prepare well yourself.

Civil services are always a good option.You can obviously do IAS preparation along with your degree.Infact it adds a plus point for you like if you are doing BE from any core branch like civil or mechanical you can always choose that as your subject for IAS preparation.I would like to suggest you if you wanna do IAS preparation start devoting atlest few hours for studying newspapers but nowadays in IAS most of the questions are from current affairs.