Through KVPY channel, the candidates having valid KVPY fellowship from year 2019-20 can apply for admissions. Throgh SCB channel the admission is possible for you as you have passed the exam in 2018. You will be considered to apply for the degree programs only if you have your 10+2 cutoff marks. You can know the cutoff marks for your category here on the website mentioned below.

www.iiseradmission.in

One more thing is that if you are applying throgh the SCN channel then you have to appear for IISER Aptitude Test (IAT).