I want previous year papers of hsc board

Hii Om!
Sorry Dear, but you didn't mention the stream of subjects you are pursuing and the class. But, let me tell you that you may get the sample papers on the official hsc website as most of the education board websites provide with them. You can even refer to certain books or question banks related to you subjects which provide previous year question papers or sample papers with solutions. This will help you know the pattern of the exam and help you score well. Hope you understand.
Good luck!