If you forgot to enter your 12th marks in the TNEA application but uploaded the marksheet or certificate, don’t worry just yet. While uploading the document is important, entering the marks manually is also a key part of the application process, as it helps in ranking and merit calculation. It's best to immediately contact TNEA helpline or your assigned facilitation center to inform them and request correction. If the application correction window is still open, they might allow you to edit it.