Please upload your 12th marks sheet. Because that is the proof that you have completed your 12th, During document verification process, you can also show your Biology compartment marks sheet. The document upload is to prove that you have completed your 12th and it acts as a proof of your eligibility. Because you can upload only 1 document upload your 12th Marks sheet and during document verification submit your Biology marks sheet as well. That would be fine. If you have appeared for NEET 2020. for a complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer