98% of the questions are asked from NCERT books alone and so if you read them and understand the concepts, there should be no reason as why you cannot score 550 and above in NEET. There are many advanced books in the market but they focus on the advanced knowledge. But if you do not have the basics correct, you cannot understand those books. So stick to NCERT first. Once you are done with atleast 1 revision of NCERT books, then you can turn to:

Concepts of Physics by H. C. Verma
Objective Physics By DC Pandey
Fundamentals of Physics by Halliday, Resnick and Walker
Fundamental Physics by Pradeep
Problems in General Physics by IE Irodov

Physical Chemistry by OP Tandon
ABC of Chemistry for Classes 11 and 12 by Modern
Concise Inorganic Chemistry by JD Lee
Dinesh Chemistry Guide
Practise books by VK Jaiswal, MS Chauhan and N Awasthi

Biology Vol 1 and Vol 2 by Trueman
Objective Biology by Dinesh
Objective Botany by Ansari
Pradeep Guide on Biology
GR Bathla publications for Biology

If you want to appear for NEET 2021, you can prepare with the help of our NEET Knockout package: https://learn.careers360.com/knockout-neet-may/