mera matlab haa ki maa abhi class 12 main hu orr mujhe neet bhi dene haa...tho kyaa maa iss time apna naam change kar vaa skati huu kyaa...mujhe koi problem thodi hogi..and dummy matlab kii jab mera naam change hoo gayega tab maa school valo koo bol dungi kii aagar hoo sake tho new name add kar loo...by the way thanku so much for reply maam 🙏

You can change your name legally and get an affidavit done. You do not get Identification proofs like Aadhar card again when you change your name. You will have to be with the same Aadhar card but change your name based on the legal supporting documents. And then you can go to the school in which you are studying so that they can help you with name change in the records before the final marks sheet is released.
And with the legal supporting documents in place, you can study your 12th and also appear for NEET.