Hello,

If you have already applied for SSC CHSL you cannot apply once again. You have to apply for all exams conducted by SSC with single registration. You need to login with your registration number and password each time you have to apply for an exam for which you are eligible. You cannot register multiple times with same Class 10th roll number as there is no such provision to create multiple accounts with the same class 10th roll number. So you cannot register and apply once again for SSC CHSL. However, you can modify the registration details by logging in with your credentials. To modify the details click on 'Modify Registration' after logging in. Click on 'Edit' and make the necessary modifications and submit it. You can modify the registration details for two times for each exam.