Balaji, NBE will open its correction window tentatively from December 7th to December 15th. And as mentioned, the dates are tentative. So you need to keep an eye on the official window for the official dates.Now, you cannot make changes to all fields in the application form. You CANNOT correct your Name, Date of Birth, Nationality, Gender, Photograph, Signature, Email Id, Mobile No#, Exam city and Category. But there is no mention of thumb impression. To be honest, if it is a thumb impression, we would suggest you to wait to hear from NBE to make changes. If you receive any notification asking you to make changes then you may during the correction window or else consider the application to be good.

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