hello aspirant,

YES, you can upload your class 10th marksheet and make any correction in NEET application window when it will open.

Further, if you have made any other relevant errors and mistakes Then, you'll be getting Notified by the NTA authorities, in your given Email ID, regarding the same and you'll have to make the necessary corrections in your NEET application form once the application window open up.

Further, If you wish to know more further details regarding the NEET application form and exam details, you ca follow the below mentioned link to know more ; https://medicine.careers360.com/exams/neet

Further, since you are a NEET aspirant, below are some of teh best preparation tips that will help you to ace the NEET exam easily :

Prepare A Well-laid Plan

Draft a daily schedule.

Prioritize the topics that require more time and relevant to the subject.

Stick to the routine and pay special attention to problems.

Get Hold Of The Syllabus

Manage your time effectively

Understand Basic Concepts

Evaluate your knowledge on basic concepts.

Make notes on required topics.

Choose The Right Study Material

Further, to know more about the best books for NEET and preparation tips and strategies you can follow the below mentioned link to know more : https://medicine.careers360.com/articles/neet-preparation-tips

I hope that this will help.