Hy,

For admissions and counseling processes, certificates need to be valid at the time of application and possibly beyond, depending on the rules of the counseling authority.

If your certificate have validity of one year, make sure it is valid at the time of counselling and beyond that. Preferably until you get admission.

Typically, institutions require certificates to be valid for the entire duration of the academic year or beyond, especially for professional courses like those covered by AP EAMCET.