Hi Anil

In case you have forgotten your roll number, you will be able to access it again by logging into the ICAI exam portal (using your Login ID and Password). Once logged in, click on the link in front of 'Admit Card - December 2017' and access your CA CPT December 2017 roll number from there. The link to ICAI Exam portal is also given below.

In case the problem persists, and you are still not able to access your roll number, then contact the Help Desk numbers of ICAI on- 1800 419 2929, 0120-3054 851, 0120-3054 852, 0120-3054 853, 0120-3054 854, 0120-3054 835, 0120-4953 751, 0120-4953 752, 0120-4953 753, 0120-4953 754.

ICAI Exam Login Link- Click here

Hope it will help!
All the best!