JAMB has announced that no changes to registration data (name, age, gender, state of origin) will be allowed after submission. Ensure accuracy during registration to avoid irreversible consequences. To correct data before registration: 1. Visit NIMC to correct erroneous details. 2. Text "REQUERY NIN" to 55019/66019. 3. Receive confirmation of updated data from NIMC. 4. Visit a CBT Center, fill out a form, and pay the required fee.