Which is a better course for GST, income tax return and accounts maintenance among MBA, LLB, CA ad CS?

Definitely, in CA, you will get to implement more of accounting terms you mentioned.

If you want to study only about GST then go for courses related to GST, otherwise, CA is the best option.

You can choose either MBA or CA. But I would say that you choose CA as it includes everything.

You can choose either MBA or CA. But I would say that you choose CA as it includes everything.

Among the listed course, CA is the best course for GST, income tax return and account maintenance.

GST, ITR, etc, are jobs for accountants. Hence, CA is the only option among all that deals with these subjects. All others tread shortly but there concept is entirely different.

If you want to get the knowledge of accounting as well as taxation (GST as you mentioned), according to me, you should choose CA with a combination of LLB. Why I am saying LLB because in the near future if you want to make a career in indirect taxation, GST refunds will be greater opportunity for CA