hi reader,

migration certificate is obtained from the college/school you last studied in.

since you passed your 12th in 2020 and assuming you didnot join any college back then,you should contact your school for providing you the migration certificate,

i hope this helps

for knowing your chances of getting a college you can refer

https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

thank you