cut off marks in 2020 I scored 420 will I get a chance to join in Goa medical college???
See it is little bit difficult to predict your exact admission possibility in Goa Medical college because cut-offs are bound to change depending upon various factors such as number of candidates appearing in an examination, number of candidates qualifying an examination, difficulty level of paper and so on.
But although according to the marks you have mentioned in the question you have very low or almost no chances of getting into Goa Medical college as per previous year's cut-offs which you can check out from the link given below :-
But yes you can try for some privete colleges or Deemed Universities because you have good chances in them on the basis of previous year's cut-offs.
To have a list of those colleges which you can get based upon your marks, category and state you can use NEET College Predictor :-
I hope this information helps you.