Sunil, NTA has opened the correction window thrice until now the last one being closed on July 15th. If you haven't corrected the error these 3 times, unfortunately, there is nothing much that can be done at this point in time. Because NTA has been clear that it will not entertain any requests for changes in the application form once the correction window has been closed nor will make changes to the application on its own. And also to answer your question, you cannot have different information at different stages of NEET application, Counselling, etc. Once you appear for NEET and the merit list has been released, it is released based on the Category you chose at the time of filling the NEET application form and the Counselling process also follows the same Category that you have chosen and unfortunately you do not have an option to change your Category for All India or State Counselling. And the document verification centres do not have the authority to make changes to whatsoever fields. They verify the information mentioned on the application form and check for the relevant documents and if you do not have them, they make a note of it and then the document verification will remain incomplete.