Mrigank, a score of 145 is really good for CAT 2019 and although we cannot accurately estimate the percentile until the official data is released, your score is expected to lie between 97 to 98 percentile. Also, you also have a stellar past academic performance.

FMS calls students above 94-95 percentile in OBC category for the next rounds. For IIMs, Ahmedabad might have a slightly higher cutoff and Bangalore prefers some work experience. Other than that, you can easily get a call from IIM Calcutta, Kozhikode, Lucknow and Indore as they expect a 95-96+ percentile and you also clear their 10th, 12th and graduation marks cutoff.

So you can expect calls from most of these institutes. You can start preparing for the further rounds- GD, PI, WAT- as differs from college to college since they also carry significant weightage in your final selection. All the best.