Hi Mahesh,
After polytechnic in CS there are carrer oppurtunities which you can choose. But today MNC's and other small scale companies take graduates for their jobs like BCA graduates.So if you  have sufficient economic back up for your studies you can take a degree or study futher in CS for a good job

For tour qualification you can do
IT Trainer,Data entry staff,Online form filling agent/Data entry,Computer operator,Typist,Computer mechanic,Technical assistant,Computer instructor.
Hope you get it, All the best.