Yes, you can change your examination centre, but the portal for application correction has not been put up yet.Correction of applications can be done in january and the dates for correction of discrepencies in application are give in the official website. Check the following website.

https://ntaneet.nic.in/Ntaneet/Registration/Instruction.aspx

As it can be seen corrections and changes in centres can be done from 14.01.2019 (Monday) to 31.01.2019 (Thursday)

Actually they do allow changes to be made once when the window opens for correction.

But you need to be more careful while filling the choice.

Read the rules and regulations in the website.