What is the scope of B.Sc. in computer science? How can it help me in future?

it has a good scope but only if you do M.Sc with it. as only b.sc will not give you good scope.

If you want good IT career you can chose B.Sc CS but you must your plan education until Post graduation degree for a good developer career. Once you complete M.Sc CS you will able to get a good job in IT companies.

Earnings are surely assured with a B.Sc. But, I don't know whether you are satisfied with them. I think you have to go for a higher qualification. It is better for you to complete M.Sc also.