Hii!
The admissions to BSc Nursing course are taken via the entrance exam conducted by the Colleges or Universities providing the course. Admissions are also done based on the marks obtained in NEET UG entrance examination.
Some of the exams are named-  JIPMER , DSAT, CENTAC, ITM NEST,  IGNOU OPENNET etc.,
So, you need to specify the name of the College or the University to know the dates for application form process to start. Kindly reframe your question and ask again including the necessary details.
Hope you understand.
Good luck!