Here is the details:Step 1: Visit the official website www.cbse.nic.in.Step 2: Check out the u201cRecent Announcementsu201d section.Step 3: Click on u201cOnline Application for Class XII Compartmentu201dStep 4: Now look for u201cOnline Submission of LOC for Compartment/IOP Exam 2018u201d or u201cOnline Application for Private Candidate for Comptt/IOP Examination 2018u201d.Step 5: Select a suitable link as per your class. Enter Roll Number, School Code, Centre Number and click on u201cProceedu201d Button.Step 6: Now a form will be displayed on the screen. Fill the form carefully and submit. Pay attention and fill all your details correctly. If your details are incorrect, your form may get rejected.Step 7: After filling all your details correctly, upload the scanned copy of your photo and signature.Step 8: After uploading all your documents, go to the fee payment option. You can pay the fee via demand draft or e-challan.Step 9: After making the payment click on u201cSubmitu201d button and take printout of confirmation page.Step 10: Now you have to send your documents to the address of regional office within 7 days. Documents including the photocopy of the confirmation page, photocopy of marksheet and e-challan or if you have paid via demand draft, then the original DD must be sent.Students who have successfully registered themselves for the exam may download their CBSE Compartment Admit Card once it is available on the official website.I hope you got your answer.