i got 623/720 in neet 2020 which college i can expect to get through councelling

Your profile states that you are from Delhi. Going by last year's cutoffs and your score, it would be difficult to get any government college in Delhi. However you can expect Lady Hardinge Medical College which had the cutoff score of 613 and the respective rank was 5228. Now this year there are high chances that t cutoffs will increase. But keep in mind that these are based on last year's data and this year the cutoffs can change. To get complete list of all colleges you can get based on your rank use this link http://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer
Through all India quota, you have fair chances of getting a government seat for MBBS in colleges such as Tezpur Medical College, Raichur Institute of Medical Sciences, Mizoram Institute of Medical education and Research, Rajah Muttiah Medical college, GMC Villipuram, GMC Khaleelwadi, GMC Nalgonda, Rampurhat Government Medical College etc.