Hey,

If you have already submitted your TNEA application you cannot directly edit the EMIS number yourself in the online portal. To edit this you need to contact the TNEA authorities directly or visit a TNEA facilitation center as the EMIS number is generally not editable after initial registration. You can find the contact information TNEA in their official website. Clearly explain the representatives why you need to edit your EMIS number providing any necessary supporting documents if needed. They will guide you the necessary steps which may involve submitting a request or to make any payment as per their instructions.

Good luck.