NEET 2021 is going to be conducted with a revised and reduced syllabus. We do not have the official syllabus yet. So to check the CBSE updated syllabus available at: http://cbseacademic.nic.in/revisedcurriculum_2021.html is the best option. Sticking to NCERT books also is the best option. We also do have NEET Knockout package: https://learn.careers360.com/knockout-neet-may/ that you can check if you are preparing for NEET.