First and Foremost: – NCERT Text Books & NCERT Exemplar for Class XI & XII.
Other than NCERT (after completing NCERT) you can go for following books-
………..BIOLOGY ……
⬅️ -: MTG Ncert at your Fingertips
⬅️ -: Truman’s Objective Biology
………..CHEMISTRY ……………..
⬅️ -: MTG Ncert at your Fingertips
⬅️ -: Organic & Inorganic Chemistry By O. P. Tendon
➡️ -: Physical Chemistry By P. Bahadur
……..……PHYSICS ..………..
➡️ -: Concepts Of Physics By HC Verma
➡️ -: Objective Physics By D. C. Pandey
But you Should Keep that in Mind –
The NCERT books are to be studied inside out. Every diagram, every table, every figure is important. So, your main core books are these. Remember, revision is key to mastering the subject.
The rest other books are only to help you get oriented to the Examination pattern, so that you are acquainted to solving objective type questions. So don’t buy too many references. One per subject should suffice.
Concepts of Physics by HC Verma provides solved and unsolved problems for practice which also serve as the sample questions for NEET preparation.
DC Pandey also helps prepare aspirants for the other objective-type questions.
Focus on completing the portion from NCERT books first.