Hello Deepak

If you have lost your neet 2020 score card you should contact the exam conducting authority , National Board Of Examination ( NBE ). You will have to provide your details like application number , neet roll number etc.

You will havev to request for duplicate score card.

NBE may ask you to submit certain documents which includes identification proof such as adhar card ,passport or any other specific document .

You may be have to pay some fees for the process .

You will not get your score card immediately.  There is processing time , after that you may get your duplicate score card .