Ayesha, your passport is necessary only if you are applying as a NRI/OCI/PIO or a Foreign National. In that case, Passport is mandatory. But if you are an Indian Citizen and you have applied for NEET, you can show any other other proof like a PAN Card, Voter's Id, Aadhar card, etc. You need to get the Passport renewed immediately if you are a NRI/OCI/PIO or a Foreign National. But if you are an Indian Citizen, you needn't necessarily submit only a passport for Id proof.