There are 3 types of certificates NCC cadets can secure A, B, and C, you will be eligible for 'NCC- A' certificate after you have spent 1-2 years in the Junior division (School level) and attended one training camp.
For 'NCC- B' certificate you should have atleast 75% classes in the Senior Secondary level and one training camp.
For 'NCC- C' certificate you must be a NCC- B certificate holder, in your 3rd year at college and should have attended at least one out door camp atleast.
So if you have NCC certificate, it will give you a chance during the EAMCET counseling period in getting a good college for your higher degree course.
During the counseling your NCC certificate must be sent to the verification you will be considered for NCC reservation.
Based on all the consideration criteria you will be allotted the seat during the EAMCET counselling.

Good Luck.