Hi

You have not mentioned the category you belong to so I am  assuming  you from general category if you belong to any other category then do let me know in comment .

In neet 2019, 436 marks was the lowest marks that was required for general  category for getting a government quota mbbs seat in a medical under Telangana  State quota and it was for AYAAN INSTITUTE OF MEDICAL SCIENCES

You can check the same at
https://medicine.careers360.com/articles/neet-cutoff-telangana/amp


But cut off marks  keeps changing every year depending upon various factors like number of students that appeared in the exam, kind of marks obtained by them , toughness level of the examination etc.

So , you should try to get at least 500 marks in your neet 2020 examination  to be on the safer side


Thankyou